Method for processing benzoic acid, sorbic acid and saccharin sodium salt in food before detection

A technology of benzoic acid and sorbic acid, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of ineffective removal of protein, fat, starch and other substances, interference of target substance detection results, and short service life of chromatographic columns. Achieve the effects of low cost, less chemical reagents, and pollution prevention

Inactive Publication Date: 2013-10-09
QINGDAO RICHEN FOODS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] However, in the actual operation of food testing, there are still many irregular samples, including viscous liquid samples such as sauces, sesame paste, etc., semi-solid samples such as hot pot seasoning, pickled vegetables, etc., and solid samples such as beef powder and barbecue marinade. etc., due to containing thousands of chemical components with different properties and states, the above methods of adjusting the pH value, combining potassium ferrocyanide and zinc acetate to precipitate protein, and extracting and extracting cannot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Carry out pre-processing for food testing on sesame paste, hot pot seasoning and beef powder respectively,

[0034] Step 1: Crush, take the sesame paste and beef powder directly (because the beef powder here is itself a powder, so there is no need to crush it), and crush the solid matter in the hot pot seasoning;

[0035] Step 2: Weighing, weighing a certain amount of the sample to be tested in the dialysis bag with the lower end closed;

[0036] Step 3: dialysis, add sodium hydroxide aqueous solution into the dialysis bag containing the sample, then tie the upper end of the dialysis bag tightly, place it in a graduated cylinder to make up the volume with water, and let it stand for dialysis;

[0037] Step 4: Filtration, take a certain amount of liquid outside the dialysis bag, adjust the pH value to acidity, make up the volume with water, then filter with a microporous membrane, and take the filtrate for detection by high performance liquid chromatography.

[0038...

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Abstract

The invention belongs to the technical field of food detection, and particularly relates to a method for processing benzoic acid, sorbic acid and saccharin sodium salt in food before detection. The method comprises the following steps of 1. smashing: smashing solid samples and semisolid samples into small lumps, and directly taking liquid samples; 2. weighing: weighing a certain amount of samples to be detected in a dialysis bag with the lower end closed; 3. dialyzing: adding sodium hydroxide water solution into the dialysis bag with samples, then tightening the upper end of the dialysis bag, putting into a measuring cylinder and metering the volume with water, standing and dialyzing; and 4. filtering: taking a certain amount of liquid outside the dialysis bag, regulating the pH value to be at acidity, metering the volume with water, then filtering with a filter membrane, and taking the filtrate for detecting. The method has the characteristics of eliminating interferences, protecting a chromatographic column, using less chemical reagent, being safe and reliable, lo3wering the detection cost, being simple in operation, and the like.

Description

technical field [0001] The invention belongs to the technical field of food detection, and specifically relates to a pretreatment method before detecting benzoic acid, sorbic acid and sodium saccharin in food by high performance liquid chromatography, which can effectively remove viscous liquid samples, semi- Interference from proteins, starches, polysaccharides, colloids, granular impurities, bacteria and other substances in solid samples and solid powder samples. Background technique [0002] "Food is the most important thing for the people", food is the material basis for human beings to survive, and it is the first need for human beings to maintain growth and health. Food safety has attracted more and more attention, and the development of food testing technology is the technical support to ensure food safety. [0003] The complete food testing process includes sample collection, sample pretreatment, analysis and determination, data processing, and result expression....

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 纪春雨郭春生崔宝军
Owner QINGDAO RICHEN FOODS
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