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Ready-to-use test paper for rapid assessment of content of aluminum elements in food, and use method and application thereof

A technology of aluminum element and food, which is applied in the direction of analyzing materials through chemical reactions, measuring devices, and material analysis through observation of the impact on chemical indicators, etc. Problems such as expensive operation, to achieve the effect of increasing the scope of use, reducing the cost of testing, and strengthening market supervision

Active Publication Date: 2016-09-28
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many detection methods for aluminum, such as spectrophotometry, graphite furnace atomic absorption spectrometry, mass spectrometry, inductively coupled plasma emission spectrometry, etc. Most of them require expensive instruments and complicated operations, and specialized technicians, and The detection period is long and the cost is high, and on-site detection and popularization cannot be realized

Method used

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  • Ready-to-use test paper for rapid assessment of content of aluminum elements in food, and use method and application thereof
  • Ready-to-use test paper for rapid assessment of content of aluminum elements in food, and use method and application thereof
  • Ready-to-use test paper for rapid assessment of content of aluminum elements in food, and use method and application thereof

Examples

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Embodiment 1

[0069] A ready-to-use test paper for quickly evaluating the content of aluminum in food, the production steps are as follows:

[0070] (1) Prepare 1% sulfuric acid solution: absorb 1mol / L sulfuric acid and dilute with water until the volume percentage of sulfuric acid added to the total volume of the solution is 1-3%, to obtain 1% sulfuric acid solution;

[0071] (2) Preparation of acetic acid-sodium acetate solution: Weigh sodium acetate and dissolve it in water until the mass concentration of sodium acetate is 0.075-0.076g / mL, then add glacial acetic acid, adjust the pH to 5-5.5, and then dilute with water to the mass concentration of sodium acetate 0.068g / mL to obtain acetic acid-sodium acetate solution;

[0072] Described sodium acetate: the ratio g of glacial acetic acid: mL is 17:1.3-1.5;

[0073] (3) Preparation of 3% acetic acid solution: absorb glacial acetic acid and slowly add it to ultrapure water until the volume percentage of glacial acetic acid is 3%, then mix ...

Embodiment 2

[0108] A ready-to-use test paper for quickly evaluating the content of aluminum in food, the production steps are as follows:

[0109] First, the preparation of the early solution

[0110] 1. 1% sulfuric acid solution: draw 1mL of 1mol / L sulfuric acid and dilute to the 100mL mark with water.

[0111] 2. Acetic acid-sodium acetate solution: Dissolve 34g of sodium acetate in 450mL of water, add 2.6mL of glacial acetic acid, adjust the pH to 5.5, and dilute to 500mL with water.

[0112] 3. 3% acetic acid solution: Take 3mL of glacial acetic acid and slowly add it to 97mL of ultrapure water, and mix well (used to simulate common white vinegar in daily life).

[0113] 4. Cetyltrimethylamine bromide solution: Weigh 20mg of cetyltrimethylamine bromide and dilute it with water to the mark of 100mL, the solution is 0.2g / L.

[0114] 5. Chromazurin S solution: Weigh 50mg of chromazurin S and dilute it with water to the mark of 100mL, the solution is 0.5g / L.

[0115] 2. Optimization of...

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Abstract

The invention relates to ready-to-use test paper for rapid assessment of the content of aluminum elements in food, wherein the test paper comprises the following preparation steps: preparing a 1% sulfuric acid solution; preparing an acetic acid-sodium acetate solution; preparing a 3% acetic acid solution; preparing a hexadecyl trimethylamine bromide solution; preparing a chrome azurol S solution; preparing developing test paper; preparing a standard colorimetric card; and obtaining the ready-to-use test paper. The test paper is used for detecting the content of aluminum based on a chrome azurol S method; a condition that aluminum is subjected to a reaction with chrome azurol S in the presence of hexadecyl trimethylamine bromide to become blue in the pH range of 6.7-7.0 is mainly utilized, and colorimetric quantitation is carried out; the test paper can rapidly accurately determine the content of aluminum in the food, better ensures consumer physical safety, improves the accuracy of safety indicators for detection of the food, strengthens the food market supervision, and has important significance; and at the same time, the test paper has the advantages of small size, portability, convenience in detection, low cost, and easy popularization.

Description

technical field [0001] The invention belongs to the technical field of food safety detection, in particular to a ready-to-use test paper for quickly evaluating the content of aluminum in food and its use method and application. Background technique [0002] Aluminum and its compounds are ubiquitous in the environment and are the most abundant metal elements in the earth's crust. Due to their excellent physical and chemical properties, aluminum and its related products are widely used in daily life and production. Therefore, aluminum exposure in the crowd is unavoidable. Avoided. A large number of epidemiological studies have proved that excessive intake of aluminum for a long time can cause obvious neurological changes and affect mental development; when the aluminum content in food exceeds 5-10 times the aluminum content in the general diet, it can cause bone damage. Softening and fracture, resulting in bone damage and deformation, rickets, osteoporosis and other diseases....

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78G01N2021/7759
Inventor 程代王春玲侯丽华王冬洁黄健宇刘青润李想
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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