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A kind of detection method of benzoyl peroxide in flour

A technology of benzoyl peroxide and a detection method, which is applied in material analysis by observing the influence on chemical indicators, analysis by chemical reaction of materials, preparation of samples for testing, etc., can solve the problem of reduced use efficiency, Increase the probability of false detection, accuracy and accuracy can not meet the needs and other problems, to achieve the effect of accurate detection results, ensure accuracy, and improve response sensitivity

Active Publication Date: 2022-08-05
广州智汇生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reagents of this kit are all stored in liquid form. In the storage stage after the reagent solution is configured, it may be oxidized and deteriorated due to the presence of a small amount of reducing agent and reducing substances, which will affect the experimental results in actual use and greatly improve the use efficiency. Reduced, increased probability of false detection
In addition, this method uses a standard color card to interpret the results, and the standard BPO solution is selected for the production of the color card. This standard solution does not have low extraction efficiency, but this problem cannot be ignored in the actual detection of samples, which leads to problems with The measurement results of actual samples are quite different, and the precision and accuracy cannot meet the needs

Method used

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  • A kind of detection method of benzoyl peroxide in flour
  • A kind of detection method of benzoyl peroxide in flour

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of detection method of benzoyl peroxide in flour, comprises the steps:

[0041] (1) Pre-treatment: Cook deionized water for 10 minutes; Divide the boiled deionized water into 3 equal parts: 1 part add excess ferrous sulfate powder, stir evenly for 1 minute without other color changes, then add potassium thiocyanate solution , observe the color change, and detect whether there is carbonate ion; add a small amount of low-concentration potassium permanganate solution to 1 part, and observe the color change after stirring evenly for 1 minute. If there is no color change in all parts, interference has been eliminated, and the third part is used as preparation water, sealed and stored for later use;

[0042] (2) Extraction: Take flour 1 to be tested, add ethanol and prepare a mixed solution with a volume ratio of water of 8:2, shake for 1 min, let stand for 3 min, filter the supernatant, and collect the filtrate;

[0043](3) reaction: add solid ferrous sulfate powder ...

Embodiment 2

[0048] A kind of detection method of benzoyl peroxide in flour, comprises the steps:

[0049] (1) Pretreatment: the same as in Example 1;

[0050] (2) Extraction: Take flour 2 to be tested, add ethanol and prepare a mixed solution with a volume ratio of water of 5:5, shake for 2 minutes, let stand for 3 minutes, filter the supernatant, and collect the filtrate;

[0051] (3) reaction: add solid ferrous sulfate powder to the filtrate collected above, shake for 3min, and leave standstill for 3min; then add potassium thiocyanate solution with a mass concentration of 1%, shake for 5s; the potassium thiocyanate solution The preparation process is as follows: take 10 grams of potassium thiocyanate and dissolve it in 200 ml of preparation water, pour it into a volumetric flask and dilute to 1L, and obtain a 1% potassium thiocyanate solution after ultrasonication for 10 minutes;

[0052] (4) Detection: Observe the color immediately, pour the above-reacted test solution into the cuvett...

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Abstract

The present invention disclosed a detection method of oxide oxide in flour, including steps: cooking water for 10‑20min as a preparation of water for preparation;; The collected filter fluid adds reagent B powder, shakes, static, and then adds reagent C to shake; immediately observe the color and quantitatively use the spectrophotometer method.The present invention has improved the response sensitivity while removing the interference of substances through the optimization of reagent reagents and the control of the formulation process, making the test results more accurate;The accuracy of the result.This method can quickly quantitatively test the content of BPO in the flour, that is, it is suitable for on -site detection and it is suitable for the laboratory to quickly quantitatively issue results.

Description

technical field [0001] The invention belongs to the technical field of quality detection, in particular to a method for detecting benzoyl peroxide in flour. Background technique [0002] Benzoyl peroxide, as a flour additive, has exact irritation and sensitization to human skin and upper respiratory tract in excess of a certain dose. At present, the detection methods of benzoyl peroxide in flour mainly include chemical qualitative method, redox titration, spectrophotometry, gas chromatography, high performance liquid chromatography and so on. The chemical qualitative method has low sensitivity in a large number of acidic media. The main disadvantage of the redox titration method is the poor reproducibility of the analytical results, the low precision and accuracy, and the high detection limit, so it is only suitable for low-demand high Determination of content components. Although the accuracy of spectrophotometry, gas chromatography, high performance liquid chromatography...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/31G01N1/34G01N1/28G01N1/38
CPCG01N21/78G01N21/31G01N1/34G01N1/28G01N1/38
Inventor 李丰毓志超文永贤江燕玲李元丽
Owner 广州智汇生物科技有限公司