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Rapid detection reagent for potassium bromate in flour, kit and detection method

A technology for detection reagents and detection methods, which is applied in the measurement of color/spectral properties, material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc. It needs special personnel to operate and other problems to achieve the effect of short color development time, fast color development, and ensuring food safety.

Inactive Publication Date: 2019-09-06
智锐达仪器科技南通有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods for determining the content of potassium bromate mainly include sulfite titration, back titration, potentiometric titration, liquid chromatography, ion chromatography, etc. Some detection methods require large instruments and equipment, the analysis cost is large, and some methods are complicated. And requires specialized personnel to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The method of using the above rapid detection kit for potassium bromate in flour includes the following steps:

[0033] Step 1: Weigh 0.1022g of the potassium bromate analytical standard purchased from Sinopharm Reagent Chemical Co., Ltd., dilute to 0, 2, 6, 10, 14, 18, 20 mg / L, and pipette 1 mL into a 5 mL centrifuge tube.

[0034] Step 2: Add 0.2 mL of glacial acetic acid and 0.3 mL of reagent A to the standard diluent in the centrifuge tube, and mix for 2 minutes, then add 0.3 mL of reagent B to the above solution, and pour it into a cuvette after mixing. Put it in place and avoid light, the pH is around 2.4 at this time.

[0035] Step 3: Take 2 mL of pure water in a clean and dry cuvette, put it into the channel of the multi-parameter biochemical rapid tester, select "potassium bromate" in the "test item" column, and then click "sample test" to complete the calibration.

[0036] Step 4: Pour the solution after the above reaction into a cuvette, put the cuvette into the corr...

Embodiment 2

[0038] The method of using the above rapid detection kit for potassium bromate in flour includes the following steps:

[0039] Step 1: Weigh 0.1022g of the potassium bromate analytical standard purchased from Sinopharm Reagent Chemical Co., Ltd., dilute to 0, 3, 5, 7, 9, 14, 18 mg / L, and pipet 1 mL into a 5 mL centrifuge tube.

[0040] Step 2: Add 0.2 mL of glacial acetic acid and 0.3 mL of reagent A to the standard diluent in the centrifuge tube, and mix for 2 minutes, then add 0.3 mL of reagent B to the above solution, and pour it into a cuvette after mixing. Store and protect from light, the pH is around 2.1 at this time.

[0041] Step 3: Take 2 mL of pure water in a clean and dry cuvette, put it into the channel of the multi-parameter biochemical rapid tester, select "potassium bromate" in the "test item" column, and then click "sample test" to complete the calibration.

[0042] Step four, pour the solution after the above reaction into a cuvette, put the cuvette into the correspo...

Embodiment 3

[0044] The method of using the above rapid detection kit for potassium bromate in flour includes the following steps:

[0045] Step 1: Weigh 0.1022 g of the analytical standard of potassium bromate purchased from Sinopharm Reagent Chemical Co., Ltd., dilute to 0, 1, 2, 4, 6, 7, 8 mg / L, and pipette 1 mL into a 5 mL centrifuge tube.

[0046] Step 2: Add 1mL of glacial acetic acid and 0.2ml of reagent A to the standard dilution in the centrifuge tube, mix for 2 minutes, then add 0.2ml of reagent B to the above solution, mix and pour it into a cuvette to stand still , Protect from light, at this time the pH is 1.

[0047] Step 3: Take 2 mL of pure water in a clean and dry cuvette, put it into the channel of the multi-parameter biochemical rapid tester, select "potassium bromate" in the "test item" column, and then click "sample test" to complete the calibration.

[0048] Step 4: Pour the solution after the above reaction into a cuvette, put the cuvette into the corresponding detection cha...

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Abstract

The invention relates to a rapid detection reagent for potassium bromate in flour, a kit and a detection method. The rapid detection reagent for potassium bromate in flour comprises a reagent A and areagent B, wherein the reagent A is a 0.225 mol / L potassium iodide solution, and the reagent B is a 1% starch solution. After adopting the technical scheme of the invention, when the detection kit used in the invention detects that the potassium bromated has a pH value of 1-2, the color development time is short and the color is stable when the potassium bromated is protected from light, meanwhile, 0-8 mg / kg potassium bromate standard has linear absorbance at different concentration gradients, and the correlation coefficient R2 reaches 0.9074 or more. The rapid detection reagent is suitable for on-site rapid detection of potassium bromate content in food, has the advantages of rapid color development and high detection rate, and is beneficial to safeguarding people's economic interests andensuring people's edible safety.

Description

Technical field [0001] The invention relates to a rapid detection reagent, a kit and a detection method for potassium bromate in flour, and belongs to the technical field of food quality safety detection. Background technique [0002] As a flour additive, potassium bromate can effectively enhance the toughness and elasticity of the dough and improve the taste. However, recent studies have shown that potassium bromate has a paralyzing effect on the central nervous system and is a highly toxic carcinogen. Although my country banned the addition of potassium bromate to flour in 2005, there are still flour manufacturers adding potassium bromate to improve quality. Therefore, the quality control of potassium bromate in flour is of great significance. [0003] The current methods for determining the content of potassium bromate mainly include sulfite titration, back titration, potentiometric titration, liquid chromatography, ion chromatography, etc. Some detection methods require large-...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/31
CPCG01N21/31G01N21/78
Inventor 杨燕葛明娟李乾
Owner 智锐达仪器科技南通有限公司
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