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Method for detecting benzoyl peroxide content of flour simply, conveniently and quickly

A technology of benzoyl peroxide and content, which is applied in the field of fluorescence detection, and achieves the effects of low cost, easy popularization and application, and simple operation

Inactive Publication Date: 2012-10-03
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the detection of benzoyl peroxide in flour by fluorescence method

Method used

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  • Method for detecting benzoyl peroxide content of flour simply, conveniently and quickly
  • Method for detecting benzoyl peroxide content of flour simply, conveniently and quickly
  • Method for detecting benzoyl peroxide content of flour simply, conveniently and quickly

Examples

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Embodiment 1

[0022] The mensuration of benzoyl peroxide content in embodiment 1, flour

[0023] 1. Preparation of stock solution:

[0024] (1) fluorescent reagent N-methoxyrhodamine 6G lactam (as shown in formula (I), wherein, X is CH 3 , Y is the standard stock solution of H): Accurately weigh 44.35 mg of N-methoxyrhodamine 6G lactam, dissolve it with 100 mL of acetonitrile, and obtain a standard stock solution of N-methoxyrhodamine 6G lactam with a concentration of 1 mM ;

[0025] (2) The standard stock solution of benzoyl peroxide: accurately take by weighing benzoyl peroxide 50mg, dissolve with 100mL ethanol, obtain the standard stock solution of the benzoyl peroxide that concentration is 0.5g / L;

[0026] (3) the standard stock solution of ferrous chloride: accurately take ferrous chloride tetrahydrate 745.2mg, dissolve with 25mL three times of water, obtain the standard stock solution of the ferrous chloride that concentration is 150mM;

[0027] 2. Preparation of sample solution to...

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Abstract

The invention provides a method for detecting the benzoyl peroxide content of flour simply, conveniently and quickly. The method comprises the following steps of: (1) adding different amounts of the benzoyl peroxide into mixed solution of N-methoxyl rhodamine lactam shown as a formula (I) and ferrous chloride to react to obtain reaction solution, irradiating the reaction solution by using exciting light with wavelength of 515 nm, and measuring the fluorescence intensity of the reaction solution at the position of wavelength of 555 nm to obtain a linear equation between the benzoyl peroxide concentration of the mixed solution and the variation value of the fluorescence intensity of the reaction solution, wherein the variation value of the fluorescence intensity of the reaction solution is the differential value of the fluorescence intensity of the reaction solution and the fluorescence intensity of the mixed solution; and (2) adding a benzoyl-peroxide-containing sample to be tested into the mixed solution of the N-methoxyl rhodamine lactam shown as the formula (I) and the ferrous chloride to react to obtain reaction solution a, irradiating the reaction solution a by using the exciting light with wavelength of 515 nm, measuring the fluorescence intensity of the reaction solution a at the position of wavelength of 555 nm to obtain the fluorescence intensity of the reaction solution a so as to obtain the differential value of the fluorescence intensity of the reaction solution a and the fluorescence intensity of the mixed solution, and obtaining the benzoyl peroxide concentration of the mixed solution according to a linear equation so as to obtain the benzoyl peroxide content of the sample to be tested. The method is high in measurement accuracy in a certain range, has theadvantages of simpleness and convenience in operation, low cost, quickness, high efficiency and the like, and is easy to popularize and apply.

Description

technical field [0001] The invention relates to a simple and fast method for detecting the content of benzoyl peroxide in flour, which belongs to the technical field of fluorescence detection. Background technique [0002] Benzoyl peroxide (BPO or BP) as a whitening agent has been widely used in the bleaching of wheat flour. The basic principle is that benzoyl peroxide can oxidize and destroy the conjugated double bonds of carotenoids in wheat flour, so that the color of wheat flour can be improved and improved. However, excessive addition of benzoyl peroxide not only affects the taste of flour products, but also produces a large amount of decomposition products of benzoyl peroxide, which is not conducive to human health. Since May 1, 2011, the Ministry of Health of the People's Republic of China has banned the addition of benzoyl peroxide in flour production. [0003] At present, various methods for detecting benzoyl peroxide content in flour mainly include high performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 马会民陈巍史文李照刘洋张经华刘清珺
Owner INST OF CHEM CHINESE ACAD OF SCI
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