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Method for Rapid Determination of Aluminum Content in Wheat Foods

A technology for rapid determination of aluminum content, applied in the measurement of color/spectral characteristics, etc., can solve the problems of low work efficiency, high detection cost, long sample processing time, etc. Effect

Active Publication Date: 2015-11-18
甘肃省商业科技研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these detection methods, nitric acid, perchloric acid digestion, microwave digestion and dry ashing are used to process samples. The sample processing takes a long time, the work efficiency is low, and the detection cost is high.

Method used

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  • Method for Rapid Determination of Aluminum Content in Wheat Foods
  • Method for Rapid Determination of Aluminum Content in Wheat Foods
  • Method for Rapid Determination of Aluminum Content in Wheat Foods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Weigh 0.1g of chromazurin S, dissolve in 100mL ethanol solution (1+1), mix well to obtain chromazurin S solution with a mass volume concentration of 1g / L; dissolve 3.0mL of emulsifier OP in 100mL of water, Make emulsifier OP solution; weigh 0.6g cetylpyridinium bromide, dissolve in 30mL ethanol (φ(C 2 h 5 OH)=95%), add water to dilute to 200mL to obtain cetylpyridine bromide solution; take 100mL of anhydrous ethylenediamine, add 200mL of pure water, and slowly add 190mL after cooling, the mass volume concentration is 1.19g / mL hydrochloric acid, stir well, and adjust the pH value to 6.7 to 7.0 to prepare ethylenediamine-hydrochloric acid buffer solution; use the aluminum standard stock solution with a mass volume concentration of 1.0 mg / mL to prepare a mass volume concentration of 0.5 μg / mL and 1.0 μg / mL, 2.0μg / mL, 3.0μg / mL, 4.0μg / mL and 5.0μg / mL six kinds of aluminum standard solutions; Each aluminum standard solution is processed as follows: draw 100μL aluminum stand...

Embodiment 2

[0062] Weigh 0.1g of chromazurin S, dissolve in 100mL ethanol solution (1+1), mix well to obtain chromazurin S solution with a mass volume concentration of 1g / L; dissolve 3.0mL of emulsifier OP in 100mL of water, Make emulsifier OP solution; weigh 0.6g cetylpyridinium bromide, dissolve in 30mL ethanol (φ(C 2 h 5 OH)=95%), add water to dilute to 200mL to obtain cetylpyridine bromide solution; take 100mL of anhydrous ethylenediamine, add 200mL of pure water, and slowly add 190mL after cooling, the mass volume concentration is 1.19g / mL hydrochloric acid, stir well, and use a pH meter to adjust the pH value to 6.7-7.0 to prepare ethylenediamine-hydrochloric acid buffer solution; prepare a mass volume concentration of 0.5 μg / mL with an aluminum standard stock solution with a mass volume concentration of 1.0 mg / mL , 1.0μg / mL, 2.0μg / mL, 3.0μg / mL, 4.0μg / mL and 5.0μg / mL six kinds of aluminum standard solutions; Each aluminum standard solution is processed as follows: draw 100μL alumin...

Embodiment 3

[0066] Weigh 0.1g of chromazurin S, dissolve in 100mL ethanol solution (1+1), mix well to obtain chromazurin S solution with a mass volume concentration of 1g / L; dissolve 3.0mL of emulsifier OP in 100mL of water, Make emulsifier OP solution; weigh 0.6g cetylpyridinium bromide (CPB), dissolve in 30mL ethanol (φ(C 2 h 5 OH)=95%), add water to dilute to 200mL to obtain cetylpyridine bromide solution; take 100mL of anhydrous ethylenediamine, add 200mL of pure water, and slowly add 190mL after cooling, the mass volume concentration is 1.19g / mL hydrochloric acid, stir well, and adjust the pH value to 6.7 to 7.0 to prepare ethylenediamine-hydrochloric acid buffer solution; use the aluminum standard stock solution with a mass volume concentration of 1.0 mg / mL to prepare a mass volume concentration of 0.5 μg / mL and 1.0 μg / mL, 2.0μg / mL, 3.0μg / mL, 4.0μg / mL and 5.0μg / mL six kinds of aluminum standard solutions; Each aluminum standard solution is processed as follows: draw 100μL aluminum...

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Abstract

The invention provides a method for quickly determining the content of aluminum in flour-made foods. The method comprises the following steps of: preparing six types of standard aluminum solution by using standard aluminum stock solution; absorbing the standard aluminum solution into a colorimetric tube with scales, respectively adding chromazurine S solution, emulsifying-agent OP solution, bromohexadecyl pyridine solution and ethylenediamine-hydrochloric acid buffer solution, fixing the volume, shaking uniformly, and then standing to determine the light absorbance; drawing a series of working curves of the standard aluminum solution; weighing a flour-made product to be determined, drying, grinding and sieving, and preparing into a dry-based sample; adding distilled water and acid liquor into the dry-based sample, carrying out ultrasonic extraction, and filtering to obtain a sample preparation liquor; adding the sample preparation liquor and the reagent into the colorimetric tube, fixing the volume to the scale, shaking uniformly, and then placing to determine the light absorbance and simultaneously making a blank experiment; and calculating the content of the aluminum in the flour-made products according to a formula. The method provided by the invention has the advantages that the sample detection period can be shortened, the energy is saved, the stability and the reproducibility are good, the recovery rate is high and the detection requirement of a laboratory can be met.

Description

technical field [0001] The invention belongs to the technical field of food safety detection, and relates to a method for measuring the content of a certain element in flour-made food, in particular to a method for quickly measuring the content of aluminum in flour-made food. Background technique [0002] Aluminum is not an essential element for the human body. So far, it has not been found that when the human body is deficient, it will cause any damage to health. On the contrary, excessive intake of aluminum salts will cause cumulative poisoning in the human body, affect the growth of children's bones, and will also affect their intelligence to a certain extent. It can lead to harmful diseases such as senile dementia, encephalopathy, bone disease, kidney disease, non-iron-deficiency anemia, and decreased immune function. [0003] The biggest source of aluminum in flour-based foods is artificial over-use and excessive use of aluminum-containing food additives (for example, u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33
Inventor 钱滢文洪霞高志莹
Owner 甘肃省商业科技研究所有限公司
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