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Rapid test kit for benzoyl peroxide (banned additive) in flour and preparation method thereof

A technology of benzoyl peroxide and a detection kit, which is applied in the direction of analyzing materials through chemical reactions and analyzing materials through observing the impact on chemical indicators, and can solve the problems of low detection limit, complicated operation steps, High sensitivity and other issues, to achieve the effect of mild reaction conditions, simplified operation process, and sensitive color reaction

Inactive Publication Date: 2011-10-05
JIANGSU VOCATION & TECHNICAL COLLEGE OF FINANCE & ECONOMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two methods require an image collector and a benzoyl peroxide content determination software system based on computer chromaticity recognition, and the degree of fading is not strongly correlated with the concentration of benzoyl peroxide, and the detection accuracy is not high
Chinese Patent Publication No. 101210907A discloses a high-performance liquid chromatography detection method for benzoyl peroxide in wheat flour. The detection sensitivity and accuracy of the method are high, but the method needs to carry out complex pretreatment operations to samples, and sample analysis Long time, requires expensive HPLC
Chinese Patent Publication No. 101339136A discloses a chemiluminescence system and method for measuring benzoyl peroxide. The detection principle is to utilize the reaction between benzoyl peroxide and luminol to generate light radiation with a wavelength of 425nm. The detection limit of the method is low, high sensitivity, but this method requires a chemiluminescence instrument, and the reaction process requires divalent cobalt ions as a catalytic substance, and the operation steps are complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: kit preparation

[0016] 1. Preparation of reaction reagent: Accurately weigh 0.140 g ferrous ammonium sulfate hexahydrate ((NH 4 ) 2 Fe(SO 4 ) 2 ×6H 2 O) in a 100 ml volumetric flask, add water to dissolve, then add 2 ml of 10 mol / L hydrochloric acid solution, and dilute to the mark with water, which is the reaction reagent; pack the reaction reagent in a dark or opaque container, and use Squeeze the container by hand to squeeze out the reaction reagent drop by drop;

[0017] 2. Prepare the color developer: accurately weigh 6.074 g of potassium thiocyanate (KSCN) in a 100 ml volumetric flask, add water to dissolve, and then dilute with water to the mark, which is the color developer; pack the color developer in a container, The container can be but not limited to a dark or opaque container, and the color developer can be squeezed out drop by drop by squeezing the container by hand;

[0018] 3. Prepare the positive control reagent stock solution: acc...

Embodiment 2

[0020] Embodiment 2: kit preparation

[0021] 1. Preparation of reaction reagents: Accurately weigh 0.356 g of ferrous chloride tetrahydrate (FeCl 2 ×4H 2 O) In a 1000 ml volumetric flask, add water to dissolve, then add 20 ml of 10 mol / L hydrochloric acid solution, and dilute to the mark with water, which is the reaction reagent; pack the reaction reagent in a dark or opaque container, and use Squeeze the container by hand to squeeze out the reaction reagent drop by drop;

[0022] 2. Preparation of developer: accurately weigh 3.806 ammonium thiocyanate (NH 4 SCN) in a 100 ml volumetric flask, add water to dissolve, and then dilute with water to the mark, which is the color developer; pack the color developer in a container, which can be but not limited to a dark or opaque container. The squeeze container can squeeze out the color developer drop by drop;

[0023] 3. Prepare the positive control reagent stock solution: accurately weigh 0.125 g of benzoyl peroxide into a 250...

Embodiment 3

[0025] Embodiment 3: kit preparation

[0026] 1. Preparation of reaction reagents: Accurately weigh 0.149 g of ferrous sulfate heptahydrate (Fe(SO 4 ) 2 ×7H 2 O) In a 100 ml volumetric flask, add water to dissolve, then add 2 ml of 10 mol / L sulfuric acid solution, and dilute to the mark with water, which is the reaction reagent; pack the reaction reagent in a dark or opaque container, and use Squeeze the container by hand to squeeze out the reaction reagent drop by drop;

[0027] 2. Preparation of color developer: Accurately weigh 6.080 g of sodium thiocyanate (NaSCN) in a 100 ml volumetric flask, add water to dissolve, and then dilute with water to the mark, which is the color developer; pack the color developer in a container, The container can be but not limited to a dark or opaque container, and the color developer can be squeezed out drop by drop by squeezing the container by hand;

[0028] 3. Prepare positive control reagent stock solution: accurately weigh 0.15 g of b...

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Abstract

The invention discloses a rapid test kit for benzoyl peroxide (banned additive) in flour and a preparation method thereof. The test kit comprises a reaction reagent, a color-developing agent, a positive-control reagent stock solution and a standard colorimetric card; the reaction reagent is a ferrous ion acidic aqueous solution with the concentration of 100mg / L-300mg / L; the color-developing agentis a thiocyanate radical aqueous solution with the concentration of 0.5mol / L-0.75mol / L; the positive-control reagent stock solution is a benzoyl peroxide ethanol solution with the concentration of 500mg / L-1500mg / L; and the standard colorimetric card comprises a number of small comparator blocks, and each comparator block corresponds to a concentration of benzoyl peroxide. According to the invention, after the color of a sample to be tested is developed according to the operation method of the test kit, qualitative and semi-quantitative analyses are directly performed by contrast to the standard colorimetric card, and no large-sized analyzer is used in the entire process of sample analysis, therefore the operation process is simplified, and the time for analysis is shortened.

Description

technical field [0001] The invention relates to a rapid detection kit and a preparation method, in particular to a rapid detection kit and a preparation method of a flour prohibited additive benzoyl peroxide. Background technique [0002] Benzoyl peroxide (Benzoyl Peroxide, BPO), chemical formula [C 6 h 5 C(O)O] 2 , is an organic peroxide, which has a significant whitening effect on flour. In 1986, the National Food Additives Standardization Technical Committee passed the safety review and included benzoyl peroxide in my country's "Hygienic Standards for the Use of Food Additives" (GB2760), allowing it to be used as a flour treatment agent and bleaching agent in wheat flour processing, with a maximum usage limit 60mg / kg. However, because benzoyl peroxide destroys the nutritional components of flour, especially for β-carotene and V in flour E Has a strong destructive effect. The intake of benzoic acid, the oxidation product of benzoyl peroxide, increases the burden on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 顾鹏程田林双吴存兵屠湘君陈长毅李逸鹤穆飞虎陈芳
Owner JIANGSU VOCATION & TECHNICAL COLLEGE OF FINANCE & ECONOMICS
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