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Method for reducing prometryn in marine bivalves

A technology of bivalve molluscs and prochlorperm, which is applied in food science, food ingredients, and food ingredients as pH modifiers, etc. The effect of adding value and reducing processing costs

Inactive Publication Date: 2020-04-21
HEBEI AGRICULTURAL UNIV.
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (1) There are some security issues, such as 60 Co-γ irradiation has potential safety hazards of isotope radiation, which has high requirements on the operating site and has an impact on the health of operators;
[0005] (2) Chemical degradation usually brings secondary pollution, which largely limits the wide application of chemical methods in degrading pesticide residues
[0006] (3) Most degradation methods usually have obvious effects on the degradation of fluid substances, but the effect on solid substances is greatly reduced because it is difficult to act on the inside

Method used

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  • Method for reducing prometryn in marine bivalves
  • Method for reducing prometryn in marine bivalves
  • Method for reducing prometryn in marine bivalves

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 Ozone water preparation and the degradation of ozone molecule, active substance

[0038] 1. Determination of ozone concentration

[0039] Turn on the ozone generator (Qingdao Xinmei Purification Equipment Co., Ltd.), pass ozone into the test container with a theoretical output of 3g / h, and the volume of double-distilled water receiving ozone is 1L. After equilibrating for 5 minutes, the ozone water was collected and the ozone concentration in the water was measured. The method for measuring the ozone concentration: add 20% potassium iodide solution 20mL in a 250mL iodine measuring bottle, add 100mL of ozone generated by the ozone generator, mix well, add 5mL of 3mol / L sulfuric acid solution, and use 0.005mol / L sodium thiosulfate standard When the solution is titrated to nearly colorless, add 1 mL of 0.5% starch solution, continue to titrate until the solution is colorless, and calculate the ozone content.

[0040] The relationship between the ozone passin...

Embodiment 2

[0065] The impact of embodiment 2 degradation time on promethazine degradation rate

[0066] Test method: fresh bay scallops → soak in clean water for 72 hours → soak in standard promethazine aqueous solutions of different concentrations at 0°C for 72 hours → put in ozone water under different experimental conditions for treatment → shelling, beating → extraction, purification, concentration →Through the membrane→Gas chromatography detection.

[0067] Select the standard initial mass concentration of promethazine as: 0.01, 0.05, 0.10, 0.20, 0.30mg / kg for degradation test of 3, 5, 10, 15, 20, 30, 60min, the results are as follows Figure 8 As shown, when degraded for 30 minutes, the degradation rate reached the maximum, and when the sampling treatment time increased from 30 minutes to 60 minutes, the degradation efficiency of promethazone did not increase significantly, especially at low concentrations. Therefore, considering efficiency and cost, it is ideal to use 30min proce...

Embodiment 3

[0068] The impact of embodiment 3 ozone concentration on promethazine degradation rate

[0069] Test method: fresh bay scallops → soak in clean water for 72 hours → soak in standard promethazine aqueous solutions of different concentrations at 0°C for 72 hours → put in ozone water under different experimental conditions for treatment → shelling, beating → extraction, purification, concentration →Through the membrane→Gas chromatography detection.

[0070] The ozone concentration is selected as: 0.6, 1.2, 1.8, 3.0, 4.2mg / L as the test concentration, the results are as follows Figure 9 Shown, along with the concentration of ozone water increases, the prolongation of ozone water treatment time, strengthens to the degradation efficiency of promethazine, when ozone concentration is 4.2mg / L, when processing time is 30min, ozone water is to the protozoon in bay scallop. The degradation efficiency of grass net can reach 84.97%.

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Abstract

The invention discloses a method for reducing prometryn in marine bivalves, which belongs to the technical field of food pesticide residue reduction. According to the invention, degradation is carriedout under combined action of direct oxidization of ozone molecules in ozone water and indirect oxidization of active free radicals. The final concentration of ozone is controlled to be 4.0-4.2 mg / L,Na2CO3 or citric acid is adopted to adjust the pH value of the solution to be 6-7, the solution system is in a constant-temperature water bath environment, the temperature is 23-27 DEG C, cleaning isconducted after treatment is conducted for 20-40 min, and a marine bivalve product with prometryn residues greatly reduced is obtained. The method can safely and efficiently degrade prometryn residuesin marine bivalves, the degradation rate can reach 85% or above to the maximum extent, the structure of the product is prevented from being damaged, the processing cost of the product is reduced, theadditional value of the product is increased, and besides, the nutritional ingredients of marine bivalves are kept to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of reduction of pesticide residues in aquatic products, in particular to a reduction method of proturon in marine bivalve molluscs. Background technique [0002] At present, the reduction methods of agricultural and veterinary drug residues in aquatic products mainly include adsorption method and degradation method. The adsorption method can be used for the removal of pesticides and veterinary drugs. For example, the entrainment method is mainly to reduce the residual pesticides in agricultural products by absorbing some adsorptive substances such as activated carbon, quartz sand, resin, etc. Degradation methods are divided into biological degradation, chemical degradation and physical decomposition. Biodegradation includes microbial transformation and enzymatic engineering degradation; physical degradation mainly includes ultrasonic treatment, irradiation treatment, etc.; chemical degradation mainly includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20
CPCA23L5/276A23V2002/00A23V2200/06A23V2250/032A23V2250/128A23V2250/1614
Inventor 王向红桑亚新田亚亚亢春雨赵春青李桂敏
Owner HEBEI AGRICULTURAL UNIV.
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