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Method for measuring content of lead and bismuth elements in depollution solution

A technology of element content and solution, applied in the field of chemical analysis, can solve the problems of 2 hours to complete the test, large demand for spare parts, high reagent consumption, etc., achieve high application value and market economic value, simple sample processing process, The effect of less reagent consumption

Inactive Publication Date: 2015-11-18
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method uses the flame atomic absorption method. The steps of this method are cumbersome, and sample processing steps such as evaporation to dryness and salt dissolution are required first. During the analysis, lead and bismuth elements need to be measured separately using different analysis conditions. The demand for spare parts It is very large. When determining the content of lead element, it is necessary to use the hollow cathode lamp of lead element, and to measure the bismuth element, it is necessary to replace the hollow cathode lamp of bismuth element and the T-shaped quartz tube atomizer. Therefore, even skilled technicians use flame atomic absorption Determination of the content of lead and bismuth elements in the decontamination solution using the method also takes 2 hours to complete the test
Flame atomic absorption method consumes a lot of reagents, and needs to use lead and bismuth standard solutions, hydrochloric acid, potassium borocyanide and other reagents, which cause great pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of lead-bismuth mixed standard solution: first divide 0.5mL of 1mg / mL lead standard solution into a 100mL volumetric flask, then divide 0.5mL of 1mg / mL bismuth standard solution into the same 100mL volumetric flask to deionize Dilute to volume with water, shake well and set aside. This step obtains the standard solution of the analyte element whose content of lead and bismuth is 5mg / liter, and the standard solution of the analyte element is used for making the working curve.

[0022] (2) Dispense 5mL of the decontamination solution before cleaning the parts into a 25mL volumetric flask, dilute to the mark with deionized water, shake well and set aside. This step yields sample solution one.

[0023] (3) Dispense 5mL of the decontamination solution after cleaning the parts into another 25mL volumetric flask, dilute to the mark with deionized water, shake well and set aside. This step yields sample solution II.

[0024] (4) Set the following measurement ...

Embodiment 2

[0042] (1) Preparation of lead-bismuth mixed standard solution: first divide 1mL of 1mg / mL lead standard solution into a 100mL volumetric flask, then divide 1mL of 1mg / mL bismuth standard solution into the same 100mL volumetric flask, dilute with deionized water to the mark, shake well and set aside. In this step, a standard solution of the analyte element with a lead and bismuth content of 10 mg / liter is obtained, and the analyte element standard solution is used for making a working curve.

[0043] (2) Dispense 10mL of the decontamination solution before cleaning the parts into a 50mL volumetric flask, dilute to the mark with deionized water, shake well and set aside. This step yields sample solution one.

[0044] (3) Dispense 10mL of the decontamination solution after cleaning the parts into another 50mL volumetric flask, dilute to the mark with deionized water, shake well and set aside. This step yields sample solution II.

[0045] (4) Set the following measurement cond...

Embodiment 3

[0063] (1) Preparation of lead-bismuth mixed standard solution: first divide 0.2mL of 1mg / mL lead standard solution into a 100mL volumetric flask, then divide 0.2mL of 1mg / mL bismuth standard solution into the same 100mL volumetric flask to deionize Dilute to volume with water, shake well and set aside. This step obtains the analyte element standard solution with lead and bismuth content of 2mg / liter, and the analyte element standard solution is used to make the working curve.

[0064] (2) Dispense 5mL of the decontamination solution before cleaning the parts into a 50mL volumetric flask, dilute to the mark with deionized water, shake well and set aside. This step yields sample solution one.

[0065] (3) Dispense 5mL of the decontamination solution after cleaning the parts into another 50mL volumetric flask, dilute to the mark with deionized water, shake well and set aside. This step yields sample solution II.

[0066] (4) Set the following measurement conditions in the wor...

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Abstract

The method for measuring the content of lead and bismuth elements in a depollution solution comprises steps as follows: (1) preparing a to-be-measured element standard solution; (2) preparing a sample solution I from the depollution solution before cleaning of parts for use; (3) preparing a sample solution II from the equivalent depollution solution after cleaning of the parts for use; (4) setting test conditions of inductive coupled plasma atomic emission spectrometry, measuring element content of deionized water, the to-be-measured element standard solution, the sample solution I and the sample solution II through an inductive coupled plasma atomic emission spectrometer; (5) recording measuring results, subtracting the lead element content of the sample solution I from the lead element content of the sample solution II, subtracting the bismuth element content of the sample solution I from the bismuth element content of the sample solution II, if the two results are up to the standard, judging the content to be qualified, and otherwise, judging the content to be unqualified. The analysis process is convenient to operate, the reagent consumption is low, and the working efficiency can be improved substantially.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, in particular to a method for measuring the content of lead and bismuth elements in a decontamination solution. Background technique [0002] The pickling process has been widely used in military enterprises. When processing aeroengine blades, tin-bismuth alloys need to be used for positioning. After processing, the tin-bismuth alloys used for positioning should be removed. The low melting point elements such as lead and bismuth remaining on the surface of the blades are harmful to the environment. The material is very harmful, and it will cause grain boundary corrosion of the material, which will cause cracks and eventually cause the blade to break. Therefore, it is necessary to use a decontamination solution to clean the blade to remove the low melting point elements such as lead and bismuth remaining on the blade surface. [0003] According to the existing technical requirements, aft...

Claims

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Application Information

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IPC IPC(8): G01N21/68
Inventor 赵勇李骏涛岳航郭子静马静付宇刘伟刘石羽
Owner AECC AVIATION POWER CO LTD
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