Rice washing salt, preparation method and application

Abstract

The invention belongs to the technical field of plant salt preparation, and particularly relates to a rice washing salt and a preparation method and application thereof.Halophyte, alkali metal and alkaline earth metal are jointly subjected to high-temperature melting ashing, heavy metal is removed, the mixture is compounded with chlorate, organic acid salt and phosphate, and the rice washing salt is obtained. Or preparing food-grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, organic acid salt and phosphate to obtain the rice washing salt. On one hand, the rice washing salt solution is alkaline, and when rice food is washed, the rice washing salt solution can improve the white cleanliness of rice grains, remove residual old taste, remove residual rancidity and improve the taste of rice; and on the other hand, the rice washing salt can reduce the influence of alkalinity on transition infiltration within the surface layer of rice or grains, promote esterification and combination of protein and starch and reduce starch dissolved substances, the cooked rice grains can absorb water to swell to the maximum extent, and the fragrance of the rice is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of plant salts, and in particular relates to rice washing salt, a preparation method and application thereof. Background Art

[0002] Halophytes are a type of plant that can grow on saline-alkali soil. The salt content in saline-alkali soil is high. Halophytes grow in saline-alkali environments and accumulate inorganic salts of more than 30% of dry matter in the stems and leaves of the plants by absorbing mineral nutrients from the soil. After being absorbed and accumulated by halophytes, they are rich in various minerals and trace elements such as sodium and potassium. They are healthy and safe plant salts that meet the human body's requirements for the balance of macro-mineral elements and trace mineral elements, and have broad development and application prospects and value.

[0003] The existing plant salt ash extraction technology mainly involves collecting halophytes, washing, drying, crushing, and high-temperature ash, dissolving in water to obtain alkaline plant salt substances, and further dissolving in hydrochloric acid to prepare halophyte salts. The purpose of the existing technical method is to prepare halophyte-derived edible salts. Plants absorb soil nutrients while also absorbing and enriching heavy metals. Plant salts are prepared by direct ash, and the preparation process does not fully consider the process of optimizing the alkalinity strength of plant salts and purifying and removing heavy metal pollution. Summary of the invention

[0004] In order to solve the problems raised by the background technology, the present invention provides a rice washing salt, a preparation method and an application.

[0005] The technical solution of the present invention is as follows:

[0006] The invention provides a rice washing salt, which contains 20-60% of sodium carbonate and / or sodium bicarbonate, 5-20% of potassium carbonate and / or potassium bicarbonate, 10-30% of sodium chloride and / or potassium chloride, 5-10% of organic acid salt and 1-15% of phosphate.

[0007] The rice washing salt contains 50-60% of sodium carbonate and / or sodium bicarbonate, 5-10% of potassium carbonate and / or potassium bicarbonate, 15-20% of sodium chloride and / or potassium chloride, 5-10% of organic acid salt and 1-15% of phosphate.

[0008] The rice washing salt,

[0009] One method is to prepare with food grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, organic acid salts and phosphates;

[0010] One method is to prepare it from halophytes, specifically:

[0011] S1: The halophyte is infiltrated with a saturated solution of an alkali metal salt to obtain a first treatment product;

[0012] S2: the first treated product is mixed with an alkaline earth metal salt and an alkaline earth metal oxide, and dried to obtain a second treated product;

[0013] S3: The second treated product is ashed to obtain ash;

[0014] S4: After the ash is dissolved, it is filtered to obtain a halophyte-derived salt solution;

[0015] S5: The salt solution derived from halophytes is concentrated, dried, and powdered, and then compounded with chloride, organic acid salt, and phosphate to obtain rice washing salt.

[0016] In the step S1, the halophyte is infiltrated with a saturated solution of an alkali metal salt, and the solid-liquid ratio is 1:0.5-2.5;

[0017] In the step S2, the total amount of alkaline earth metal salts and alkaline earth metal oxides added is 0.5-3% of the weight of the halophyte.

[0018] In the step S1, the saturated alkali metal salt solution is a saturated solution of organic acid sodium, organic acid potassium, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, or potassium bicarbonate.

[0019] In step S2, the alkaline earth metal salt is calcium carbonate, magnesium carbonate, organic acid calcium, and organic acid magnesium; the alkaline earth metal oxide is calcium oxide and magnesium oxide.

[0020] In step S5, the chloride salt is sodium chloride or potassium chloride; the organic acid salt is organic acid calcium or organic acid magnesium; and the phosphate is sodium tripolyphosphate or potassium tripolyphosphate.

[0021] In the step S1, the halophytes are salsola, sea spinach, coral vegetable, peucedanum chinense, quinoa, Palmer's salt grass, salt horn grass, saltland salsa, Atriplex, saltland sage millet, coastal salt grass, Kochia, sea salicornia, sage, sea fennel, thick vine, plantain, verbena, mallow, miscanthus, reed, Spartina alterniflora, feather grass, millet, cattail, sea purslane, tamarisk, mustard, ice leaf sunflower, coastal deer hair, Atriplex, knotweed, Junda vegetable, and red beet.

[0022] The present invention also provides an application of the rice washing salt in washing cereals and cleaning fruits and vegetables.

[0023] The rice washing salt is used in cleaning cereals to improve the whiteness of rice grains, remove residual stale smell, remove residual oily smell and improve the taste of rice, remove wax on the surface of fruits and vegetables for preservation, and remove pesticide residues and pathogenic microorganisms.

[0024] Beneficial Effects

[0025] The invention obtains rice washing salt by melting halophytes, alkali metals and alkaline earth metals at high temperature to remove heavy metals, and compounding with chloride, organic acid salt and phosphate, or preparing with food-grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, organic acid salt and phosphate. On the one hand, the rice washing salt solution is alkaline, and when washing rice food, it can decompose pesticide residues, dissolve rancid and oxidized fat compounds, form a peelable starch emulsified combination with the rice powder layer on the surface of rice grains, enhance the purification effect of decomposing aflatoxin, improve the whiteness of rice grains, remove residual stale taste, remove residual oil rancid taste and improve the taste of rice; on the other hand, the rice washing salt can reduce the transition penetration effect of alkalinity on the surface layer of rice or grains, promote protein starch esterification and combination, reduce starch dissolution, and the steamed rice grains can absorb water and swell to the maximum extent, thereby increasing the fragrance of rice. DETAILED DESCRIPTION

[0026] The following examples are intended to illustrate the present invention rather than to further limit the present invention.

[0027] The invention provides a rice washing salt, which contains 20-60% sodium carbonate and / or sodium bicarbonate, 5-20% potassium carbonate and / or potassium bicarbonate, 10-30% sodium chloride and / or potassium chloride, 5-10% organic acid salt, and 1-15% phosphate. The organic acid salt is organic acid calcium and organic acid magnesium, specifically calcium citrate, magnesium citrate, calcium lactate, and magnesium lactate; the phosphate is sodium tripolyphosphate and potassium tripolyphosphate.

[0028] To ensure that the rice washing salt has a good use effect, preferably, the rice washing salt contains 50-60% sodium carbonate and / or sodium bicarbonate, 5-10% potassium carbonate and / or potassium bicarbonate, 15-20% sodium chloride and / or potassium chloride, 5-10% organic acid salt, and 1-15% phosphate.

[0029] The rice washing salt is prepared by using food-grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, organic acid salt and phosphate.

[0030] For example, food grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, as well as organic acid salts of calcium citrate, magnesium citrate, calcium lactate, magnesium lactate, and phosphates of sodium tripolyphosphate and potassium tripolyphosphate are directly used to prepare rice washing salt.

[0031] One method is to prepare it from halophytes, specifically:

[0032] S1: The halophyte is infiltrated with a saturated solution of an alkali metal salt to obtain a first treated product.

[0033] Halophytes are rich in Na, K, Ca, Mg, Si, Mn, Cu, Fe, Zn, Pb, Co, Ni, etc. Preferably, in step S1, the halophytes are Salsola, Sea Spinach, Coral Vegetable, Peucedanum peucedanum, Quinoa, Palmer's saltgrass, Salicornia, Suaeda salsa, Atriplex, Distichlis, Kochia, Salicornia, Sage, Sea Fennel, Thick Vine, Plantain, Verbena, Mallow, Miscanthus, Reed, Spartina alterniflora, Desmostachyabipinnata, Panicum turgidum, Cattail, Sea Portulaca, Tamarix, Mustard, Ice Leaf Daylily, Seashore Deer Hair, Atriplex, Polygonum cuspidatum, Junda, and Red Beet.

[0034] The ion content in the same plant varies significantly under different growth environments or planting management conditions. Generally, the Na ion content in halophytes is up to 10.5g / 100g~29.7g / 100g, and the K ion content is 2.2g / 100g~6.3g / 100g.

[0035] Before infiltration, the halophytes need to be cleaned. In order to reduce the loss of salt in the halophytes during the cleaning process, purified saline water is selected for cleaning.

[0036] To ensure the infiltration effect, preferably, in step S1, the halophyte is infiltrated with a saturated solution of an alkali metal salt, the solid-liquid ratio is 1:0.5-2.5, and the infiltration time is 10-50 min.

[0037] Furthermore, in step S1, the saturated alkali metal salt solution is a saturated solution of organic acid sodium, organic acid potassium, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, or potassium bicarbonate.

[0038] For the halophyte materials that have been removed of impurities, washed and drained, a saturated solution of alkali metal salt is used for infiltration. In the subsequent high-temperature ashing process, the alkali metal and the salt ion elements contained in the halophyte are melted and combined at high temperature to form rice washing salt which is a complex ion of the alkali metal and the salt ions contained in the halophyte.

[0039] S2: The first treated product is mixed with an alkaline earth metal salt and an alkaline earth metal oxide, and dried to obtain a second treated product.

[0040] To ensure the mixing effect, in step S2, the total amount of alkaline earth metal salt and alkaline earth metal oxide added is 0.5-3% of the weight of the halophyte.

[0041] Furthermore, in step S2, the alkaline earth metal salt is calcium carbonate, magnesium carbonate, organic acid calcium, or organic acid magnesium; and the alkaline earth metal oxide is calcium oxide or magnesium oxide.

[0042] In the subsequent high-temperature ashing and melting process, the alkali metal in step S1 and the alkaline earth metal in step S2 and the ionic elements contained in the halophyte are melted at high temperature to form a complex salt ion compound, and the alkaline earth metal is added and the ions contained in the plant are melted and combined at high temperature, so that in the subsequent dissolution and purification of the ashing salt, the alkaline earth metal complex dissolves to form flocculation, forms coordination bonds with the heavy metal ions, and achieves the effect of adsorbing and removing heavy metals.

[0043] S3: The second processed product is ashed to obtain ash.

[0044] Specifically, in step S3, the ashing is performed at a temperature of 500 to 1000° C. for a time of 50 to 120 minutes.

[0045] S4: After the ash is dissolved, it is filtered to obtain a halophyte-derived salt solution.

[0046] The alkali metal in step S1 and the alkaline earth metal in step S2 are melted with the salt ions in the halophyte plant body to form a composite salt, and the alkaline solution formed by fully stirring and dissolving the ash with pure water, the calcium or magnesium alkaline earth metal ions gradually flocculate, adsorb the heavy metals in the ash of the halophyte, and produce precipitation, and the calcium or magnesium alkaline earth metal precipitation and the adsorbed heavy metal precipitation are filtered to obtain a halophyte source salt solution.

[0047] S5: The salt solution derived from halophytes is concentrated, dried, and powdered, and then compounded with chloride, organic acid salt, and phosphate to obtain rice washing salt.

[0048] The rice washing salt obtained after milling mainly contains Na, K, SiO3 2- , as well as Ca, Mg and other elemental nutrients, including sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate. However, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate have strong alkaline permeability, which can easily destroy the starch structure of rice and affect the fragrant taste of steamed rice.

[0049] Preferably, in step S5, the organic acid salt is an organic acid calcium salt or an organic acid magnesium salt, for example, a calcium salt or a magnesium salt of citric acid, succinic acid, acetic acid, oxalic acid, lactic acid, malic acid, tartaric acid, gluconic acid, phytic acid, adipic acid, or ascorbic acid.

[0050] Weakly alkaline and low-soluble organic acid salts have a comprehensive adhesion and wrapping effect. They can form adsorption and swelling with the starch material in the rice flour layer on the surface of rice grains to form a temporary layer membrane structure, which can not only enhance the dissolution and destroy the aflatoxin ester ring to form water-soluble substances, decompose pesticides, and remove stale odors and heavy metals, but also avoid the transitional penetration of the alkalinity of sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate into the surface layer of rice or grains.

[0051] Furthermore, in step S5, the phosphate is sodium tripolyphosphate or potassium tripolyphosphate.

[0052] The compound weak alkaline tripolyphosphate has the effect of enhancing alkaline buffering and metal chelation, and can further strengthen the adsorption and swelling protection, avoid the transitional penetration of the alkalinity of sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate into the surface layer of rice or grains, promote the esterification and combination of protein and starch, and reduce starch dissolution. The steamed rice grains can absorb water and swell to the greatest extent, making the rice grains smooth, plump, crystal clear and fragrant, and comprehensively improving the sweet taste of the rice.

[0053] Furthermore, organic acid ions and tripolyphosphate ions play a chelating function on metal ions, which can fully avoid the adsorption of heavy metals to produce precipitation and the formation of strong adhesion precipitation film when simply using alkaline earth metal calcium or magnesium oxides to wash food, thereby avoiding the adverse effects of incomplete cleaning.

[0054] The high-temperature melting incineration of halophytes obtains a salt composition including sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, and a small amount of sodium chloride and potassium chloride. In order to reduce the proportion of carbonate in the alkaline plant source rice washing salt, increase the compounded organic acid calcium, organic acid magnesium salt, sodium tripolyphosphate, potassium tripolyphosphate, and adjust the sodium-potassium salt ratio of the alkaline plant source rice washing salt, that is, optimize and adjust the alkalinity of the alkaline plant source rice washing salt and reduce the damage to the rice starch structure caused by excessive penetration, in the step S5, chloride salts such as sodium chloride and potassium chloride are further compounded, and the sodium-potassium salt ratio of the alkaline plant source rice washing salt is adjusted.

[0055] From the perspective of efficient utilization of halophyte resources and development and utilization of saline-alkali land resources, using halophytes to prepare rice washing salt can more effectively promote the transformation of its ecological value into social value.

[0056] When preparing the product from halophytes, it is also taken into consideration that the salt content and salt ion composition in the halophytes vary greatly due to the influence of water and fertilizer management in the cultivation of halophytes, especially sodium-potassium ion salts containing both carbonate and bicarbonate. As a product quality control, it is required that the obtained rice washing salt contain 50-60% sodium carbonate and / or sodium bicarbonate, 5-10% potassium carbonate and / or potassium bicarbonate, 15-20% sodium chloride and / or potassium chloride, 5-10% organic acid calcium and / or organic acid magnesium, and 1-15% sodium tripolyphosphate and / or potassium tripolyphosphate.

[0057] The present invention also provides an application of the rice washing salt in washing cereals and cleaning fruits and vegetables.

[0058] Specifically, the rice washing salt is used in cleaning grains to improve the whiteness of rice grains, remove residual stale smell, remove residual oily smell and improve the taste of rice, remove wax on the surface of fruits and vegetables for preservation, and remove pesticide residues and pathogenic microorganisms.

[0059] In the present invention, halophytes, alkali metals and alkaline earth metals are melted and ashed at high temperature to remove heavy metals, and then compounded with chlorides, organic acid salts and phosphates, or prepared with food-grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, organic acid salts and phosphates to obtain rice washing salt. On the one hand, the rice washing salt solution is alkaline, and when washing rice food, it can decompose pesticide residues, dissolve rancid and oxidized fat compounds, form a peelable starch emulsified combination with the rice powder layer on the surface of rice grains, enhance the purification effect of decomposing aflatoxin, improve the whiteness of rice grains, remove residual stale taste, remove residual oil rancid taste and improve the taste of rice; on the other hand, the rice washing salt can reduce the transitional penetration effect of alkalinity on the surface layer of rice or grains, promote protein starch esterification and combination, reduce starch dissolution, and the steamed rice grains can absorb water and swell to the maximum extent, increasing the fragrance of rice.

[0060] Example 1

[0061] S1: Collect 100g of the halophyte Suaeda salsa, sieve and remove impurities, wash the Suaeda salsa with purified saline water, centrifuge and drain the washing water, and spray a saturated solution of sodium bicarbonate on the washed Suaeda salsa while rolling and turning it at a solid-liquid ratio of 1:0.5, with a rolling and turning speed of 10 rpm, and collect the saturated solution of sodium bicarbonate flowing downward and then circulate and spray it, soak the Suaeda salsa for 30 minutes, drain and obtain the first treated product.

[0062] S2: Add 1% by weight of calcium carbonate, mix thoroughly with the first treated product, and dry with hot air for 30 minutes to obtain a second treated product.

[0063] S3: The second treated product is ash-treated at 800° C. for 90 minutes to obtain ash.

[0064] S4: Dissolve the ash by stirring with pure water for 30 minutes to obtain an alkaline solution. During the dissolution process, calcium ions and magnesium ions contained in the alkali sedge form flocs, which adsorb heavy metals in the alkali sedge ash to produce precipitation, which is filtered and purified to obtain a halophyte source salt solution.

[0065] S5: The halophyte-derived salt solution is concentrated, dried, and powdered, and then compounded with sodium chloride, calcium citrate, and sodium tripolyphosphate to obtain halophyte-derived rice washing salt.

[0066] Example 2

[0067] S1: Collect 100g of halophyte Salicornia, sieve and remove impurities, wash the Salicornia with purified saline water, centrifuge and drain the washing water, and spray the washed Salicornia with a saturated solution of potassium carbonate while rolling and turning the washed Salicornia at a solid-liquid ratio of 1:2.5. The rolling and turning speed is 8 rpm, and the saturated potassium carbonate solution flowing downward is collected and sprayed in a circulation. After soaking the Salicornia for 50 minutes, drain and obtain the first treated product.

[0068] S2: Add 3% by weight of magnesium oxide, mix thoroughly with the first treated product, and dry with hot air for 50 minutes to obtain a second treated product.

[0069] S3: The second treated product is ash-treated at 900° C. for 60 minutes to obtain ash.

[0070] S4: Dissolve the ash by stirring with pure water for 50 minutes to obtain an alkaline solution. During the dissolution process, magnesium ions and calcium ions contained in the salicornia form flocs, which adsorb heavy metals in the salicornia ash to produce precipitation, which is filtered and purified to obtain a halophyte source salt solution.

[0071] S5: After the halophyte-derived salt solution is concentrated, dried and powdered, potassium chloride, magnesium lactate and potassium tripolyphosphate are compounded to obtain halophyte-derived rice washing salt.

[0072] Example 3

[0073] S1: Collect 100g of halophyte seahorses, sieve and remove impurities, wash the seahorses with purified saline water, centrifuge and drain the washing water, and spray saturated potassium hydroxide solution while rolling and turning the washed seahorses in a solid-liquid ratio of 1:1. The rolling and turning speed is 8 rpm, and the saturated potassium hydroxide solution flowing downward is collected and sprayed in a circulation. After soaking the seahorses for 10 minutes, drain and obtain the first treated product.

[0074] S2: adding 0.5% by weight of magnesium oxalate, mixing the mixture with the first treated product, and drying the mixture with hot air for 50 minutes to obtain a second treated product.

[0075] S3: The second treated product is ash-treated at 500° C. for 50 minutes to obtain ash.

[0076] S4: Use pure water to fully stir and dissolve the ash for 50 minutes to obtain an alkaline solution. During the dissolution process, magnesium ions and calcium ions contained in the seahorse teeth form floccules, which adsorb heavy metals in the seahorse tooth ash to produce precipitation, which is filtered and purified to obtain a halophyte source salt solution.

[0077] S5: The halophyte-derived salt solution is concentrated, dried, and powdered, and then compounded with sodium chloride, magnesium citrate, and sodium tripolyphosphate to obtain halophyte-derived rice washing salt.

[0078] Example 4

[0079] S1: Collect 100g of halophyte Junda, sieve and remove impurities, wash the Junda with purified saline water, centrifuge and drain the washing water, and spray the washed Junda with a saturated solution of sodium citrate while rolling and turning the washed Junda in a solid-liquid ratio of 1:2. The rolling and turning speed is 8 rpm, and the saturated solution of sodium citrate flowing downward is collected and sprayed in a circulation. After soaking for 40 minutes, drain and obtain the first treated product.

[0080] S2: adding 1.5% by weight of calcium carbonate, mixing thoroughly with the first treated product, and hot air drying for 50 minutes to obtain a second treated product.

[0081] S3: The second treated product is ash-treated at 1000° C. for 120 minutes to obtain ash.

[0082] S4: Use pure water to fully stir and dissolve the ash for 50 minutes to obtain an alkaline solution. During the dissolution process, calcium ions and magnesium ions contained in the kelp form flocs, which adsorb heavy metals in the kelp ash to produce precipitation, which is filtered and purified to obtain a halophyte source salt solution.

[0083] S5: After the halophyte-derived salt solution is concentrated, dried and powdered, sodium chloride, potassium chloride, calcium lactate, potassium tripolyphosphate and sodium tripolyphosphate are compounded to obtain halophyte-derived rice washing salt.

[0084] Example 5

[0085] S1: Collect 100g of halophyte Zinnia glabra, sieve and remove impurities, wash the Zinnia glabra with purified saline water, centrifuge to drain the washing water, and spray the washed Zinnia glabra with a saturated solution of potassium oxalate while rolling and turning it at a solid-liquid ratio of 1:1.5. The rolling and turning speed is 8 rpm, and the saturated potassium oxalate solution flowing downward is collected and sprayed in a circulation. After soaking the Zinnia glabra for 50 minutes, drain it to obtain the first treated product.

[0086] S2: Add 2% by weight of calcium oxide, mix thoroughly with the first treated product, and dry with hot air for 50 minutes to obtain a second treated product.

[0087] S3: The second treated product is ash-treated at 900° C. for 60 minutes to obtain ash.

[0088] S4: Dissolve the ash with pure water by stirring for 50 minutes to obtain an alkaline solution. During the dissolution process, calcium ions and magnesium ions contained in the ice leaf sunflower form flocs, which adsorb heavy metals in the ash of the ice leaf sunflower to produce precipitation, which is filtered and purified to obtain a halophyte source salt solution.

[0089] S5: The halophyte-derived salt solution is concentrated, dried, and powdered, and then compounded with sodium chloride, potassium chloride, calcium citrate, magnesium citrate, and sodium tripolyphosphate to obtain halophyte-derived rice washing salt.

[0090] Comparative Example 1

[0091] 100 g of halophyte seahorse teeth were collected, sieved to remove impurities, washed with pure water, centrifuged to drain the washing water, dried with hot air for 50 minutes, and ash was obtained after ashing at 500° C. for 50 minutes.

[0092] The ash was dissolved by stirring with purified water for 50 minutes to obtain an alkaline solution, which was filtered and purified to obtain a halophyte-derived salt solution.

[0093] The halophyte-derived salt solution is concentrated, dried and powdered to obtain halophyte-derived rice washing salt.

[0094] Example 6

[0095] Food grade salt is directly used for preparation, including 60% sodium carbonate, 5% potassium bicarbonate, 20% sodium chloride, 5% calcium citrate, and 10% sodium tripolyphosphate.

[0096] Example 7

[0097] Food grade salt is directly used for preparation, including 50% sodium bicarbonate, 10% potassium carbonate, 15% potassium chloride, 10% calcium lactate, and 15% potassium tripolyphosphate.

[0098] Example 8

[0099] Food grade salt is directly used for preparation, including 50% sodium carbonate, 10% sodium bicarbonate, 10% potassium carbonate, 5% sodium bicarbonate, 16% potassium chloride, as well as 3% magnesium citrate, 3% calcium lactate, 1% sodium tripolyphosphate, and 2% potassium tripolyphosphate.

[0100] Comparative Example 2 (without compounding with organic acid salt and tripolyphosphate)

[0101] Food grade salt is directly used for preparation, and only 50% sodium carbonate, 25% sodium bicarbonate, 5% potassium carbonate, and 20% potassium chloride are added. Organic acid calcium, organic acid magnesium, sodium tripolyphosphate, and potassium tripolyphosphate are not added.

[0102] application

[0103] 1. Detect the ions in the products obtained after milling in step S5 of Example 1, Example 2, Example 3, Example 4, and Example 5 and Comparative Example 1 (see Table 1), as well as the components and contents in the rice washing salt of Examples 1-8, Comparative Examples 1 and 2 (see Table 2).

[0104] Table 1 Ions in the products obtained after milling

[0105]

[0106] As shown in Table 1, the basic components of the product obtained after milling in Example 1 include a sodium content of 20.6 g / 100 g (including sodium bicarbonate or sodium carbonate, and a small amount of sodium chloride, equivalent to 75.6 g / 100 g of sodium bicarbonate), a potassium content of 3.8 g / 100 g (including potassium bicarbonate or potassium carbonate, a small amount of potassium chloride, equivalent to 9.7 g / 100 g of potassium bicarbonate), and no heavy metals were detected;

[0107] The basic components of the product obtained after powdering in Example 2 include a sodium content of 19.5 g / 100 g (including sodium bicarbonate or sodium carbonate, and a small amount of sodium chloride, equivalent to 71.3 g / 100 g of sodium bicarbonate), a potassium content of 9.7 g / 100 g (including potassium bicarbonate or potassium carbonate, a small amount of potassium chloride, equivalent to 24.8 g / 100 g of potassium bicarbonate), and no heavy metals were detected;

[0108] The powdered product of Example 3 has a sodium content of 24.9 g / 100 g and a potassium content of 8.1 g / 100 g, and no heavy metals are detected.

[0109] The product obtained after milling in Example 4 has basic components including a sodium content of 16.7 g / 100 g and a potassium content of 2.2 g / 100 g, and no heavy metals are detected;

[0110] The product obtained after milling in Example 5 has basic components including a sodium content of 21.3 g / 100 g and a potassium content of 7.5 g / 100 g, and no heavy metals are detected;

[0111] The product obtained after milling in Comparative Example 1 has basic components including a sodium content of 22.5 g / 100 g and a potassium content of 3.1 g / 100 g, and heavy metals are detected, of which the Hg content is 12.9 μg / g and the As content is 0.72 μg / g;

[0112] From the above, it can be seen that when the rice washing salt is prepared using halophytes as a source in this application, heavy metals can be effectively removed.

[0113] Table 2 Composition and content of rice washing salt

[0114]

[0115]

[0116] The sum of the components in Examples 1-5 in Table 2 is greater than 100%, because, from the perspective of quality control, only the content of sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate is measured, and organic acid salts, phosphates, and sodium chloride and / or potassium chloride are compounded, and the amount of compounding or filling can also be determined. In addition, in the prepared halophyte-derived rice washing salt, in addition to the above-mentioned carbonates, some salts (human nutrient elements) are present in a certain amount on the basis of food safety testing, and do not affect the quality effect of product application. In order to make quality control simple and easy, this part is the part that exceeds 100%, including a small amount of silicate, sodium chloride, and potassium chloride.

[0117] 2. The rice washing salts of Examples 1-8, Comparative Example 1 and Comparative Example 2 were used for washing cereals, respectively, and the rice washing effects were tested.

[0118] Specifically, 330 g of rice was taken for three servings of rice, and 0.5 g of the rice washing salt of Comparative Example 1 and Comparative Example 2 of Example 1-8 and 900 mL of pure water were added to fully wash the rice, and the color of the rice washing water was observed;

[0119] Then rinse thoroughly with 900 mL of pure water twice and drain the water. Compared with the rice grain whiteness (±) of rice washed thoroughly with pure water, see Table 3;

[0120] Similarly, one-year-old rice was selected for the rice washing experiment and washed thoroughly for three times. The residual stale taste of the rice (++~+++) and the whiteness of the rice grains (±) after washing the one-year-old rice thoroughly with pure water were compared, as shown in Table 4.

[0121] In addition, we selected coix seeds with high fat content, which are easily oxidized and rancid and produce oily rancidity, for rice washing experiment and comparison. They were washed thoroughly three times and compared with the residual oily rancidity (++~+++) and the whiteness of the rice grains (±) after being washed thoroughly with pure water. See Table 5.

[0122] Table 3 Comparison of cleaning effect of new rice

[0123]

[0124]

[0125] It can be seen from Table 3 that, compared with washing with pure water only, when washing new rice with the rice washing salt of Examples 1-5 and the rice washing salt of Examples 6-8, the rice flour layer on the surface of the rice grains is fully peeled off to form a starch emulsion combination, and the rice washing water gradually turns yellow and thick; the whiteness of the rice grains is improved, the steamed rice grains are more shiny, plump and crystal clear, and the rice is fresh and sweet.

[0126] Table 4 Comparison of the effects of cleaning one-year-old rice

[0127]

[0128]

[0129] It can be seen from Table 4 that, compared with washing with pure water only, washing one-year old rice with the rice washing salt of Examples 1-5 and the rice washing salt of Examples 6-8 has a significant effect in removing the stale smell, and no residual stale smell can be smelled (± to none); the whiteness of the rice grains is improved by 2 to 3 plus signs (++ to +++), which significantly increases the smoothness and crystal clearness of the steamed rice grains and the fresh and sweet taste of the rice.

[0130] Table 5 Comparison of the effects of cleaning coix seeds

[0131]

[0132]

[0133] It can be seen from Table 5 that compared with washing with pure water only, washing coix seeds with the rice washing salt of Examples 1-5 and the rice washing salt of Examples 6-8 has a significant effect in removing the oily rancid smell, and no residual oily rancid smell can be smelled (±~none); the whiteness of the rice grains is improved by 2~4 plus signs (++~++++), the coix seeds are easier to absorb water and swell when cooked, and the rice grains are softer, more glutinous, crystal clear, fresh and sweet.

[0134] Although the rice washing salt in Comparative Example 1 can decompose pesticide residues, dissolve rancid and oxidized fatty compounds, enhance the purification effect of decomposing Aspergillus flavus and detoxifying, improve the whiteness of rice grains, remove residual stale taste and residual oily rancid taste, due to the excessive infiltration of alkalinity, the rice flour layer on the surface of the rice grain forms a permeable stripping starch emulsion combination with a depth exceeding 1 / 2 of the radius of the rice grain, resulting in a sticky and soft starch expansion structure, which destroys the elastic, glutinous and fragrant taste of rice or cereals.

[0135] The rice washing salt of Comparative Example 2 can decompose pesticide residues, dissolve rancid and oxidized fatty compounds, enhance the purification effect of decomposing Aspergillus flavus and detoxifying, improve the whiteness of rice grains, remove residual stale taste and residual oily rancid taste when washing rice food. However, due to the excessive infiltration of alkalinity, the rice powder layer on the surface of the rice grain forms a permeable stripping starch emulsion combination with a depth exceeding 1 / 2 of the radius of the rice grain, resulting in a sticky and soft starch expansion structure, which destroys the elastic, glutinous and fragrant taste of rice or cereals.

[0136] Although potassium chloride is filled in it, the intensity of the alkali effect can be reduced. However, since the water-soluble salt ions of potassium chloride do not have the weak alkalinity to enhance buffering and metal chelation and low solubility, they cannot form a comprehensive adhesion and wrapping effect, nor can they form adsorption and swelling with the starch material in the rice flour layer on the surface of the rice grains to form a temporary layer membrane structure, and thus cannot avoid the transitional penetration of alkalinity into the surface layer of rice or grains.

[0137] 3. The rice washing salts of Examples 1-8, Comparative Example 1 and Comparative Example 2 are used to remove wax, pesticide residues and pathogenic microorganisms from the surface of fruits and vegetables for preservation, respectively, specifically,

[0138] A non-woven towel weighing 2 to 6 g, preferably 4 g, is selected, and a rice washing salt solution with a concentration of 0.1 to 0.05%, preferably 0.05%, is used to fully soak the non-woven towel to prepare an alkaline salt wet towel from a halophyte source. The wet towel is used to remove wax from the surface of fruits and vegetables for fresh-keeping, remove dust sedimentation pollutants and pesticide residues on the surface, and remove pathogenic microorganisms. The results are shown in Table 6.

[0139] Among them, pathogenic microorganisms mainly target Escherichia coli (3.9×10 6 CFU / g), Pseudomonas aeruginosa (3.4×10 6 CFU / g), Salmonella (4.4×10 6 CFU / g) and other cleaning tests, wipe the items with alkaline salt wipes from halophyte sources and test them after 10 minutes.

[0140] For pesticide residues, fruits with pesticide zinc residues (23 mg / L) were wiped with alkaline salt wipes from halophyte sources and the residue was tested after 5 minutes.

[0141] Table 6 Comparison of cleaning effects of fruits and vegetables

[0142]

[0143] Compared with the rice washing salt of comparative example 1 and comparative example 2, the rice washing salt of embodiment 1-8 has good cleaning effect in removing wax, pesticide residues and pathogenic microorganisms from the surface of fruits and vegetables. Comparative example 1 and comparative example 2 are not compounded with organic acid salt and tripolyphosphate, lacking the comprehensive adhesion and wrapping effect of weak alkaline and low-solubility organic acid salt, and the effect of weak alkaline tripolyphosphate to enhance alkaline buffering and metal chelation, and the maximum cleaning effect is not exerted.

Claims

1. A rice washing salt, characterized in that It contains 20-60% sodium carbonate and / or sodium bicarbonate, 5-20% potassium carbonate and / or potassium bicarbonate, 10-30% sodium chloride and / or potassium chloride, 5-10% organic acid salt and 1-15% phosphate.

2. Rice washing salt according to claim 1, characterized in that, The rice washing salt contains 50-60% of sodium carbonate and / or sodium bicarbonate, 5-10% of potassium carbonate and / or potassium bicarbonate, 15-20% of sodium chloride and / or potassium chloride, 5-10% of organic acid salt and 1-15% of phosphate.

3. Rice washing salt according to claim 1, characterized in that, The rice washing salt, One method is to prepare with food grade sodium carbonate and / or sodium bicarbonate, potassium carbonate and / or potassium bicarbonate, sodium chloride and / or potassium chloride, organic acid salts and phosphates; One method is to prepare it from halophytes, specifically: S1: The halophyte is infiltrated with a saturated solution of an alkali metal salt to obtain a first treatment product; S2: the first treated product is mixed with an alkaline earth metal salt and an alkaline earth metal oxide, and dried to obtain a second treated product; S3: The second treated product is ashed to obtain ash; S4: After the ash is dissolved, it is filtered to obtain a halophyte-derived salt solution; S5: The salt solution derived from halophytes is concentrated, dried, and powdered, and then compounded with chloride, organic acid salt, and phosphate to obtain rice washing salt.

4. Rice washing salt according to claim 3, characterized in that, In the step S1, the halophyte is infiltrated with a saturated solution of an alkali metal salt, and the solid-liquid ratio is 1:0.5-2.5; In the step S2, the total amount of alkaline earth metal salts and alkaline earth metal oxides added is 0.5-3% of the weight of the halophyte.

5. Rice washing salt according to claim 3, characterized in that, In the step S1, the saturated alkali metal salt solution is a saturated solution of organic acid sodium, organic acid potassium, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, or potassium bicarbonate.

6. Rice washing salt according to claim 3, characterized in that, In step S2, the alkaline earth metal salt is calcium carbonate, magnesium carbonate, organic acid calcium, and organic acid magnesium; the alkaline earth metal oxide is calcium oxide and magnesium oxide.

7. The rice washing salt according to claim 3, characterized in that In step S5, the chloride salt is sodium chloride or potassium chloride; the organic acid salt is organic acid calcium or organic acid magnesium; and the phosphate is sodium tripolyphosphate or potassium tripolyphosphate.

8. Rice washing salt according to claim 3, characterized in that, In the step S1, the halophytes are salsola, sea spinach, coral vegetable, peucedanum chinense, quinoa, Palmer's salt grass, salt horn grass, saltland salsa, Atriplex, saltland sage millet, coastal salt grass, Kochia, sea salicornia, sage, sea fennel, thick vine, plantain, verbena, mallow, miscanthus, reed, Spartina alterniflora, feather grass, millet, cattail, sea purslane, tamarisk, mustard, ice leaf sunflower, coastal deer hair, Atriplex, knotweed, Junda vegetable, and red beet.

9. Use of the rice washing salt as described in any one of claims 1 to 8 in washing cereals and cleaning fruits and vegetables.

10. The use according to claim 9, characterized in that: The rice washing salt is used in cleaning cereals to improve the whiteness of rice grains, remove residual stale smell, remove residual oily smell and improve the taste of rice, remove wax on the surface of fruits and vegetables for preservation, and remove pesticide residues and pathogenic microorganisms.

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