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Device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal

A technology of benzoyl peroxide and detection device, which is applied in the direction of material analysis by observing the effect on chemical indicators, analysis by chemical reaction of materials, color/spectral characteristic measurement, etc., can solve the problem of inability to realize on-site detection , the equipment is expensive, the operation is complicated, etc., to achieve the effect of on-site screening, fast detection, and easy portability

Inactive Publication Date: 2014-05-14
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above methods can only determine one additive in potassium bromate and benzoyl peroxide, and some methods are complicated to operate and expensive in equipment, and cannot realize rapid on-site screening
The only reported method for the simultaneous determination of potassium bromate and benzoyl peroxide in wheat flour is ion chromatography, but ion chromatography is expensive, and it is difficult to popularize in grassroots laboratories, let alone on-site detection

Method used

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  • Device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal
  • Device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal

Examples

Experimental program
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Effect test

preparation example Construction

[0048] (3) Preparation of the liquid to be tested

[0049] After taking the wheat flour sample and mixing it evenly, accurately weigh two parts of 2.000g wheat flour into a conical flask, add 20 mL of water to one part, and add 20 mL of absolute ethanol to the other part, shake for 15 min, pass through a 0.45 μm filter membrane, and the filtrate is ready for the liquid to be tested. Wherein, the filtrate of water is the potassium bromate test solution, and the absolute ethanol filtrate is the benzoyl peroxide test solution.

[0050] (4) Determination of potassium bromate and benzoyl peroxide in wheat flour

[0051] Take 2 mL of potassium bromate and benzoyl peroxide to be tested respectively in two 5 mL colorimetric tubes, add 1 mL of acetic acid and 2 mL of starch-potassium iodide chromogenic solution to the potassium bromate to be tested, and benzoyl peroxide to be tested Add 1.5 mL of phosphoric acid and 1.5 mL of starch-potassium iodide chromogenic solution to the ...

Embodiment 2

[0053] In order to verify the effect of detection device and detection method of the present invention, the inventor adopts detection device and detection method in embodiment 1 to carry out detection experiment to potassium bromate and benzoyl peroxide in wheat flour, and result is as follows:

[0054] 1. Interference experiment

[0055] The experimental instrument adopts the experimental device of the present invention, and the experimental method adopts the detection method of the present invention.

[0056] Experimental results:

[0057] Under selected conditions, the influence of common interfering substances on the determination results of potassium bromate and benzoyl peroxide was tested. Under the condition of relative error + 、Na + , Mg 2+ , Ca 2+ , Zn 2+ , NO 3- , SO 4 2- Wait. For benzoyl peroxide with a concentration of 0.1 mg / L, the substances allowed to coexist are: 1000 times K + 、Na + , Cl - , Mg 2+ , Zn 2+ 、Cu 2+ , Pb 2+ 、Cr 3+ , ...

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Abstract

The invention provides a device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal. The device comprises a reflection board arranged at the inner side of the rear wall of a measurement camera obscura, color measurement standard light sources symmetrically installed at the upper side and the lower side of the front end of the measurement camera obscura, a cuvette which is arranged at the front end of the measurement camera obscura and is opposite to the reflection board and a camera located in front of the cuvette, wherein the camera is connected with a corresponding interface of a computer through a data line. The method for simultaneously detecting the potassium bromate and the benzoyl peroxide in the wheat meal comprises the steps that an acetic acid solution, a phosphoric acid solution, a starch-potassium iodide developing solution, a standard solution of the potassium bromate and the benzoyl peroxide, and a solution to be detected are prepared; after the starch-potassium iodide developing solution is added into the standard solution or the solution to be detected of the potassium bromate and the benzoyl peroxide and a color is developed, the solution is added into the cuvette, a transmitted spectrum image of the solution after color development is shot through the camera, chromaticity values R of the solution are read through the computer, the chromaticity values R of the standard solution after color development are used for drawing a standard curve, chromaticity values R of the solution to be detected are compared with the standard curve, and therefore the content of the potassium bromate and the content of the benzoyl peroxide are obtained.

Description

technical field [0001] The invention belongs to the technical field of rapid detection of food additives. According to the optical principle, an acquisition device for the transmission spectrum image of the color developing solution is designed, and the chromaticity value of the transmission spectrum image of the solution after color development with benzoyl peroxide and potassium bromate is linear to its concentration Based on related principles, the simultaneous rapid detection of potassium bromate and benzoyl peroxide in wheat flour was realized. More specifically, it relates to a detection device and detection method for potassium bromate and benzoyl peroxide in wheat flour. Background technique [0002] Potassium bromate (KBrO 3 ) and benzoyl peroxide (BPO) have been widely used as wheat flour improvers. Potassium bromate is used as a wheat flour treatment agent, which can significantly improve the structure and rheological properties of the dough, making the bread...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/25
Inventor 张玉荣张德伟周显青
Owner HENAN UNIVERSITY OF TECHNOLOGY
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