Detection method for content of iodine in amino acid iodized salt

A detection method, amino acid technology, applied in measuring devices, material analysis by observing the influence on chemical indicators, instruments, etc., can solve the problem of inaccurate detection of amino acid iodine salt iodine content, etc., to achieve easy popularization and application, detection method Accurate and reliable, to solve the seriously low effect

Active Publication Date: 2019-07-23
SHANDONG INST FOR FOOD & DRUG CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for detecting iodine content in amino acid iodized salt, to solve the problem that there is no method for accurately detecting iodine content in amino acid iodized salt in the prior art.

Method used

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  • Detection method for content of iodine in amino acid iodized salt
  • Detection method for content of iodine in amino acid iodized salt
  • Detection method for content of iodine in amino acid iodized salt

Examples

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Embodiment 1

[0026] This embodiment claims a method for detecting iodine content in amino acid iodine salt, which includes the following steps: (1) dissolving the sample to be tested in water, then adding potassium ferrocyanide and zinc acetate, and filtering; (2) dissolving the filtrate First add oxalic acid-phosphoric acid mixed solution, then add sodium hypochlorite, and then heat the mixed solution on a temperature-adjusting electric furnace until it boils; (3) Cool the boiled mixed solution to below 30°C quickly, add potassium iodide solution and use thio Sodium sulfate standard titration solution is titrated to light yellow, and starch indicator is added; (4) Continue to titrate with sodium thiosulfate standard titration solution until the blue color just disappears as the end point.

Embodiment 2

[0028] The technical features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The technical features of this embodiment that are different from the above-mentioned embodiments are as follows: the volume ratio of the potassium ferrocyanide solution to the zinc acetate solution is 1:1.

Embodiment 3

[0030] The technical feature that this embodiment is identical with embodiment one is not repeated, the technical feature that differs from above-mentioned embodiment in the present embodiment is as follows: the concentration of described potassium ferrocyanide solution is 106g / L, the concentration of described zinc acetate solution It is 220g / L.

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Abstract

The invention provides a detection method for content of iodine in amino acid iodized salt. The method comprises the following steps of dissolving a to-be-detected sample in water, adding potassium ferrocyanide and zinc acetate, and filtering; (2) adding a mixed solution of oxalic acid and phosphoric acid into filtrate, adding a sodium hypochlorite solution, and heating the mixed solution until boiling; (3) rapidly cooling the boiled mixed solution to below 30 DEG C, adding a potassium iodide solution, titrating with a sodium thiosulfate standard titration solution to be pale yellow, and adding a starch indicator; and (4) continuously titrating with a sodium thiosulfate standard titration solution until blue just disappears as the end point. The detection method disclosed by the inventionsolves a problem that the content, which is detected by a national standard method, of the iodine in the amino acid iodized salt is low, the detection method is accurate and reliable, no extra detection instrument is needed, the operation is easy, and the method is easy to popularize and apply.

Description

technical field [0001] The invention relates to a method for detecting iodine content in table salt, in particular to a method for detecting iodine content in amino acid iodized salt. Background technique [0002] Salt is an indispensable and irreplaceable condiment in people's daily life. The supply and demand of the salt market has been stable for many years, lack of development potential and gradually reduced profits. The survival and development of salt production enterprises are insufficient, and there is an urgent need to find new economic growth points. The appearance of multi-variety salt satisfies the needs of consumers, enriches the salt market, and becomes a new profit point for salt enterprises. Multi-variety salt refers to table salt that is added with nutritional enhancers, seasoning accessories or processed through special processes. The main varieties include enhanced nutritional salt, seasoning salt, low-sodium salt, monosodium glutamate salt, bamboo salt, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78G01N2021/786
Inventor 程月红于艳艳任雪梅田洪芸鲍连艳
Owner SHANDONG INST FOR FOOD & DRUG CONTROL
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