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Fast detection method for food preservative agent and antioxidant

An anti-oxidant and detection method technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of multiple separation and purification steps, damage to detection personnel, and low detection efficiency, so as to reduce extraction and separation steps, shorten detection time, and improve The effect of accuracy

Active Publication Date: 2014-07-09
通标标准技术服务有限公司
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  • Claims
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AI Technical Summary

Problems solved by technology

At present, the commonly used detection method is to separate and purify the additives contained in the sample to be tested one by one, so there are many separation and purification steps, the detection efficiency is low, and the reagents used are more harmful, which wastes time and causes harm to the testing personnel. certain damage

Method used

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  • Fast detection method for food preservative agent and antioxidant

Examples

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Embodiment

[0027] Weigh an appropriate amount of commercially available standard substances sorbic acid, benzoic acid, tert-butylhydroxyanisole and 2,6-di-tert-butyl-p-cresol into a 50 mL volumetric flask, add water to the mark, and the concentration is 1 μg / μL, Take 1 μL of the standard solution and inject it into a gas chromatograph equipped with a hydrogen flame ionization detector for detection, and obtain a standard chromatogram. Grind 5.0 g of the commercially available ham sample to be tested into powder and add it to a 50 mL centrifuge tube, add saturated sodium chloride solution, and shake in an ultrasonic oscillator for 4 minutes to fully dissolve the sample to be tested; add dilute nitric acid to adjust the pH to 4.3 ~4.5, make the protein precipitate, stand still for 5 minutes, filter to remove the precipitate; add n-hexane to the filtrate for the first extraction, and separate the fat. Dilute phosphoric acid with a concentration of 5% and dilute sulfuric acid with a concentr...

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Abstract

The invention relates to the field of detection of food additives, in particular to a fast detection method for a food preservative agent and an antioxidant, which is characterized in that the method comprises the following steps: gathering samples of the preservative agent and the antioxidant in food, preparing standard solution, and using a gas chromatograph to measure the standard chromatogram; adding the to-be-detected samples into saturate sodium chloride solution and vibrating in an ultrasonic wave oscillation instrument, adding dilute nitric acid to adjust the pH to 4-5, filtrating and removing insoluble substances, and adding normal hexane into the filtrate to perform the first extraction; preparing mixture acid using dilute phosphoric acid and dilute sulfuric acid in the volume ratio of 3:1, using the mixture acid acidizing to extract residual, ultrasonic vibrating for 8-10 min, and adding ethanol to perform a second extraction; and injecting the extraction liquid into gas chromatograph to perform measuring, and comparing with the standard chromatogram. According to the method provided by the invention, the sample pretreatment method is simplified, the separation and purification steps are reduced and the harm of separation and purification agents to detection personnel is reduced.

Description

technical field [0001] The invention relates to the detection field of additives in food, in particular to a rapid detection method for preservatives and antioxidants in food. Background technique [0002] In recent years, as consumers are increasingly concerned about the safety of food, the detection of various additives in food, especially synthetic preservatives and antioxidants, has attracted more and more attention. At present, the commonly used detection method is to separate and purify the additives contained in the sample to be tested one by one, so there are many separation and purification steps, the detection efficiency is low, and the reagents used are more harmful, which wastes time and causes harm to the testing personnel. Certain damage. Contents of the invention [0003] Aiming at the above technical problems, the present invention designs and develops a rapid detection method for preservatives and antioxidants in food, the purpose of which is to simplify ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 冯小清
Owner 通标标准技术服务有限公司
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