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Method for determination of beryllium content in beryllium-aluminum alloy

A beryllium aluminum alloy and content technology, which is applied in the field of the determination of beryllium content in beryllium aluminum alloy by molecular imprinting method, and achieves the effects of reducing experimental error, enhancing current intensity and improving sensitivity

Inactive Publication Date: 2012-07-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of measuring beryllium content with molecularly imprinted electrochemical sensors has not been reported so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 0.5000g of the beryllium aluminum alloy sample to be tested into a 250mL beaker, add 20mL of 18% (wt / wt) hydrochloric acid, add 10mL of 30% hydrogen peroxide dropwise until the sample dissolves, rinse the cup wall with water, and heat until no bubbles are generated. Remove and cool to room temperature, add 75mL of 10% EDTA solution, add 1 drop of bromothymol blue indicator, neutralize with 20% sodium hydroxide until it turns blue (pH=7.6), heat to above 80°C, and keep warm for about 15min, cool to room temperature, add 5mL of acetylacetone solution, let it stand for 20min, transfer the solution into a 250mL separatory funnel, add a little water to wash, add 10mL of chloroform, shake vigorously for 1min, after standing for stratification, put the organic layer into another Into a 125mL separating funnel, add 50mL of 0.1mol / L sodium hydroxide solution, shake vigorously for 1min (to wash away various interfering ions and EDTA that may be brought down, if the organic l...

Embodiment 2

[0019] Weigh 0.8200g of the beryllium aluminum alloy sample to be tested in a 250mL beaker, add 25mL of 10% (wt / wt) hydrochloric acid, drop 20mL of 15% hydrogen peroxide until the sample dissolves, rinse the cup wall with water, and heat until no bubbles are generated. Remove and cool to room temperature, add 25 mL of 15% EDTA solution, add 1 drop of bromothymol blue indicator, neutralize with 15% sodium hydroxide until it turns blue (pH=7.6), heat to above 80°C, and keep warm for about 30min, cool to room temperature, add 10mL of acetylacetone solution, let it stand for 10min, transfer the solution into a 250mL separatory funnel, add a little water to wash, add 15mL of chloroform, shake vigorously for 3min, after standing for stratification, put the organic layer into another Into a 125mL separating funnel, add 20mL of 0.5mol / L sodium hydroxide solution, shake vigorously for 3min (to wash away various interfering ions and EDTA that may be brought down, if the organic layer is ...

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PUM

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Abstract

Provided is a method for quantitative determination of beryllium content in a beryllium-aluminum alloy by using a molecular imprinting method. The method is characterized in that beryllium-pyrrole / graphite imprinting electrodes are used as working electrodes, calomel electrodes are used as reference electrodes, and platinum filament electrodes are used as three-electrode systems of counter electrodes. Under the condition that potential of hydrogen (pH) is equal to 1-4, temperature ranges from 20 to 80 DEG C, and scanning speed ranges from 30 to 600mv / s, coefficient of variation (CV) curves in sulfuric acid beryllium standard solution of different densities are measured so as to obtain linear response relation, determination limits and the like. Compared with other electrodes, current intensity is improved by one magnitude, and measuring sensitivity is greatly improved.

Description

technical field [0001] The invention relates to a method for measuring beryllium content in beryllium aluminum alloy by molecular imprinting method. Background technique [0002] Beryllium is the lightest metal with a hard texture and a gray appearance. It exists in mineral rocks such as emeralds. Beryllium has the advantages of resistance to metal fatigue, corrosion resistance, insulation, non-magnetism and light texture. It is relatively insoluble in water, but is tightly adsorbed by oils, and beryllium can be found in many food ingredients. Beryllium has very important uses in national defense and electronics industry, but inhalation of metal beryllium, beryllium oxide, beryllium copper alloy or beryllium salt may cause beryllium diseases. The US EPA considers beryllium to be a possible carcinogen. [0003] Beryllium has a variety of analysis and testing methods, mainly inductively coupled plasma-atomic emission spectrometry, atomic absorption spectrophotometry, fluores...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30
Inventor 高海燕戴晓华仇小飞汪源刘瑛陈新许芳萍
Owner JIANGNAN UNIV
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