Method for measuring lead content in aluminum casting alloy LD7-1

A technology of lead content and aluminum alloy, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as low measurement efficiency, high toxicity, and environmental pollution, and achieve the effects of eliminating safety threats, improving testing efficiency, and avoiding environmental pollution

Active Publication Date: 2013-08-14
AECC AVIATION POWER CO LTD
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Problems solved by technology

[0003] The disadvantage of this method of determination is: using pure aluminum as blank solution, the dissolution process of pure aluminum is slow, resulting in low measurement efficiency; it is necessary to add mercurous chloride to aid dissolution, and mercurous chloride is highly toxic and pollutes the environment, which is harmful to the test. threats to the safety of personnel

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  • Method for measuring lead content in aluminum casting alloy LD7-1
  • Method for measuring lead content in aluminum casting alloy LD7-1
  • Method for measuring lead content in aluminum casting alloy LD7-1

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[0036] 1.1. Reagent preparation:

[0037] 1.1.1. Preparation of acid mixed solution: pipette 375ml of analytical pure hydrochloric acid and 125ml of analytical pure nitric acid into a 1000ml volumetric flask, add 500ml of distilled water, and shake well to form an acid mixed solution;

[0038] 1.1.2. Prepare a lead standard solution with a concentration of 50 μg / ml: pipette 5.0 ml of a lead standard solution with a concentration of 1000 μg / ml into a 100 ml volumetric flask, dilute to the mark with distilled water, and shake well to become Concentration is the lead standard solution of 50μg / ml;

[0039] 1.2. Prepare sample solution and blank solution:

[0040] 1.2.1. Preparation of sample solution: Weigh a batch of wrought aluminum LD7-1 chips with a weight of m as a sample, m=0.5007g, put it in a 250ml beaker, add 10ml of acid in several times Mix the solution. After the violent reaction stops, heat slowly to 100°C. After the sample is completely dissolved, add 25ml of disti...

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Abstract

The invention belongs to a metal material chemical component detecting technology and relates to an improvement to a method for measuring lead element content in an aluminum casting alloy LD7-1. The method is characterized in that the steps for measuring the lead content are as follows: preparing a reagent; preparing a sample solution; preparing lead standard solution diluents of different concentrations; measuring an absorbance value of the lead standard solution diluents; drawing a working curve of lead content; measuring the absorbance value of the sample solution; and determining the lead content in the sample solution. According to the method for measuring lead content in an aluminum casting alloy LD7-1, pure aluminum is not used as a blank solution, the pure aluminum solution needs to be added to series of standard solutions, so that the measuring efficiency is improved; and moreover, environment pollution is avoided, and security threat to measuring personnel is eliminated.

Description

technical field [0001] The invention belongs to the detection technology of chemical components of metal materials, and relates to the improvement of the method for determining the content of lead element in forged aluminum alloy LD7-1. Background technique [0002] At present, the determination method for the content of lead element in wrought aluminum alloy LD7-1 is determined according to the method in the national standard GB / 20975.11-2008: Weigh the wrought aluminum LD7-1 debris with a weight of m as a sample, m=1.0000 g, placed in a 250ml beaker, adding a total of 20ml of acid mixed solution several times, after the violent reaction stopped, slowly heating, after the test material is completely dissolved, add 25ml of distilled water, heat to boil, then cool to room temperature, set Fill to a 100ml volumetric flask, dilute to the mark with distilled water, and shake well to become a sample solution; at the same time, weigh m=0.5000g of pure aluminum instead of the sampl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 关珍张玉涛郭子静岳航王锦利杨健赵勇
Owner AECC AVIATION POWER CO LTD
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