Detection test paper for detecting benzoyl peroxide in flour and preparation method of detection test paper

A benzoyl peroxide, detection test paper technology, applied in material analysis by observing the effect on chemical indicators, analysis by chemical reaction of materials, color/spectral property measurement, etc., can solve the problem of relying on professional and technical personnel. , long cycle, low detection limit, etc.

Inactive Publication Date: 2012-01-18
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spectrophotometry takes a long time to analyze, and liquid chromatography and gas chromatography are national standards, which have the advantages of high detection precision, low detection limit and good repeatability, but there are also cumbersome and time-consuming sample pretreatment steps, expensive detection instruments, long cycle time, High cost and reliance on professional and technical personnel are not conducive to grass-roots quality inspection departments as a large-scale primary screening, not conducive to rapid on-site detection and supervision, and not conducive to guiding consumers to selectively identify flour

Method used

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  • Detection test paper for detecting benzoyl peroxide in flour and preparation method of detection test paper
  • Detection test paper for detecting benzoyl peroxide in flour and preparation method of detection test paper
  • Detection test paper for detecting benzoyl peroxide in flour and preparation method of detection test paper

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preparation example Construction

[0036] The preparation method of the detection test strip is as follows: immerse the color detection layer (3) in the mixed liquid of the color developer for 2-5 minutes, and then vacuum-dry it at 40-80° C. for 20-50 minutes.

[0037] The color developer mixed solution is composed of: 5%-10% potassium iodide, 0.2%-0.8% soluble starch, and 2%-8% sodium carbonate.

[0038] Described sodium carbonate is anhydrous sodium carbonate.

Embodiment 1

[0040] 1. Preparation of test paper: Preparation of mixed solution: 5% potassium iodide, 0.2% soluble starch, and 2% sodium carbonate are mixed evenly. Take a cellulose acetate film with good water absorption and immerse it in the color developer mixture for 2 minutes, take it out, put it in a vacuum at 40°C and dry it in the dark for 30 minutes, and cut the obtained dry test paper into 0.5cm 2 The small piece is pasted on the front end of the substrate. The substrate is made of PVC sheet, the length of the substrate is 8cm, and the width is 0.5cm 2 .

[0041] 2. Production of standard color card:

[0042] (1) Prepare benzoyl peroxide standard of 0mg / L, 12mg / L, 36mg / L, 60mg / L, 84mg / L, 108mg / L, 132mg / L, 156mg / L, 180mg / L, 228mg / L product solution, take different concentrations of benzoyl peroxide solution on the prepared detection test paper color layer to carry out color reaction.

[0043] (2) Measure the L*, a* and b* value data of the test paper with a color measuring ins...

Embodiment 2

[0047] 1. Preparation of test paper: Preparation of mixed solution: 10% potassium iodide, 0.8% soluble starch, and 8% sodium carbonate are mixed evenly. Take a cellulose acetate film with good water absorption and immerse it in the color developer mixture for 5 minutes, take it out, put it in a vacuum at 50°C and dry it in the dark for 20 minutes, and cut the obtained dry test paper into 0.8cm 2 The small piece is pasted on the front end of the substrate. The substrate is made of PVC sheet, the length of the substrate is 8cm, and the width is 0.8cm 2 .

[0048] 2. Production of standard color card:

[0049] (1) Preparation of peroxide containing concentration gradient 0mg / L, 12mg / L, 36mg / L, 60mg / L, 84mg / L, 108mg / L, 132mg / L, 156mg / L, 180mg / L, 228mg / L respectively For the benzoyl standard solution, benzoyl peroxide solutions of different concentrations are added to the prepared detection test paper color layer for color development.

[0050] (2) Utilize the computer Adobe Ph...

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Abstract

The invention discloses detection test paper for detecting benzoyl peroxide in flour and preparation method of the detection test paper. The test paper comprises a test strip and a standard colourimetric card, wherein the standard colourimetric card comprises 10 color lumps with corresponding concentration gradients of benzoyl peroxide from shallow to deep respectively 0mg/L, 12 mg/L, 36 mg/L, 60mg/L, 84 mg/L, 108 mg/L, 132 mg/L, 156 mg/L, 180 mg/L and 228 mg/L. The test strip comprises a substrate and a color-developing layer adhered on the front end of the substrate, the color-developing layer has a test function, the substrate is made of a PVC (polyvinyl chloride) sheet, and the color-developing layer is prepared by immersing a cellulose acetate film in a color-developing mixed solution consisting of 5-10 percent of potassium iodide, 0.2-0.8 percent of soluble starch and 2-8 percent of sodium carbonate and then drying in vacuum at a temperature of 40-80 DEG C for 20-50min. According to the comparison of the color-developing degree of a sample to be detected and the standard colourimetric card, the content range of the benzoyl peroxide can be rapidly judged. The detection test paper disclosed by the invention is simple, rapid and visual in operation when being used for detecting the benzoyl peroxide remained in the flour, and has high detection sensitivity and accuracy.

Description

technical field [0001] The invention relates to a detection test paper for rapid and semi-quantitative detection of benzoyl peroxide and its residual amount in flour, which can be applied to primary screening of benzoyl peroxide in flour and rapid on-site detection and supervision, and belongs to the field of food safety . Background technique [0002] Benzoyl peroxide (Benzoyl peroxide, BPO) has a strong oxidizing effect, and is widely used in the flour processing industry at home and abroad as a quality improver and whitening agent for wheat flour. The content of benzoyl peroxide is one of the important indicators of flour safety and is closely related to the quality of flour. After wheat flour is stored for a certain period of time, the addition of benzoyl peroxide will promote its rapid ripening, but it will be hydrolyzed by itself to generate active oxygen and benzoic acid; active oxygen can oxidize carotenoids and lutein and other pigments in wheat flour, thereby achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31
Inventor 谢岩黎何保山韩小贤霍权恭卫敏杨杰
Owner HENAN UNIVERSITY OF TECHNOLOGY
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