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Method for measuring metal material in waste circuit board

A technology of waste circuit boards and determination methods, which is applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problem of less exploration of simultaneous determination methods of multiple elements, achieve high sensitivity and avoid the effect of tin loss

Pending Publication Date: 2020-11-24
江西华赣瑞林稀贵金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few researches on simultaneous determination of multiple elements in waste circuit board samples

Method used

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  • Method for measuring metal material in waste circuit board
  • Method for measuring metal material in waste circuit board
  • Method for measuring metal material in waste circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Sample pretreatment:

[0028] Preparation of tartaric acid solution (100g / L): Weigh 50g of tartaric acid and place it in a 500mL beaker, dissolve it in water, transfer it to a 500mL volumetric flask, dilute to the mark with water, mix well, and then place it in a reagent bottle;

[0029] Weigh 0.2000g of the waste circuit board sample and place it in a 250mL conical beaker, moisten it with 1mL of deionized water, add 10mL of hydrochloric acid and 7.5mL of tartaric acid solution, cover with a watch glass, place it on an electric heating plate to heat, and dissolve at low temperature for about 5 minutes. Remove and cool, add 2mL hydrogen peroxide drop by drop, after the reaction is stable, put the triangular beaker on the electric heating plate and continue to dissolve at low temperature, repeat the above operation steps, repeatedly add hydrogen peroxide dropwise until the sample is completely dissolved, and dissolve at low temperature until it can dissolve If the flo...

Embodiment 2

[0047] (1) Sample pretreatment:

[0048] Weigh 0.3000g waste circuit board sample and place it in a 250mL conical beaker, wet it with 2mL deionized water, add 10mL hydrochloric acid and 7.5mL tartaric acid solution, cover with a watch glass, heat on an electric heating plate, dissolve at low temperature for 10min, take Cool down, add 2mL hydrogen peroxide drop by drop, after the reaction is stable, put the triangular beaker on the electric heating plate and continue to dissolve at low temperature, repeat the above operation steps, repeatedly add hydrogen peroxide dropwise until the sample is completely dissolved, and dissolve at low temperature until it can flow If the solution is less than 20mL, remove the conical beaker from the electric heating plate, add 30mL hydrochloric acid to dissolve the residue after cooling slightly, rinse the wall of the conical beaker with deionized water, put it back on the electric heating plate, until it boils slightly, and the residue Take off...

Embodiment 3

[0057] (1) Sample pretreatment:

[0058] Weigh 0.2500g waste circuit board sample into a 250mL conical beaker, moisten it with 1.5mL deionized water, add 10mL hydrochloric acid and 7.5mL tartaric acid solution, cover with a watch glass, heat on an electric heating plate, dissolve at low temperature for 8min, Remove and cool, add 1.5mL hydrogen peroxide drop by drop, after the reaction is stable, put the triangular beaker on the electric heating plate and continue to dissolve at low temperature, repeat the above operation steps, repeatedly add hydrogen peroxide dropwise until the sample is completely dissolved, and dissolve at low temperature to If the flowable solution is less than 20mL, remove the conical beaker from the electric heating plate, add 20mL hydrochloric acid to dissolve the residue after cooling slightly, rinse the wall of the conical beaker with deionized water, put it on the electric heating plate again, and bring it to a slight boil. Remove the triangular beak...

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Abstract

The invention discloses a method for determining a metal material in a waste circuit board, which comprises the following specific steps: determining implementation conditions, treating a waste circuit board sample, and determining and calculating lead, zinc, tin and nickel to obtain a mass fraction calculation result of lead, zinc, tin and nickel in the waste circuit board sample. According to the method for determining in diluted hydrochloric acid and tartaric acid media, the problem that in the sample dissolving process, tin generates metastannic acid precipitate, and consequently the result is low is solved, the measurement of zinc, tin and nickel is not influenced while avoiding loss of tin, the method is convenient, simple and rapid, the sensitivity of the inductively coupled plasmaatomic emission spectrometry for measuring the lead, the zinc, the tin and the nickel is high, and the daily analysis of the lead, the zinc, the tin and the nickel in the waste circuit board sample can be effectively met.

Description

technical field [0001] The invention relates to material analysis and detection technology, in particular to a method for measuring metal materials in waste circuit boards by using atomic emission spectrometry. Background technique [0002] Waste circuit boards are the core components of various electronic products. With the rapid development of the electronics industry, the number of waste circuit boards (WPCB) has also increased sharply. As a hazardous waste, waste circuit boards (WPCB) are rich in various metals and precious metals, and are valuable resources to be used. Failure to recycle will cause environmental pollution. There are various types of waste circuit boards, and the content distribution of various metals varies greatly. Therefore, the accurate determination of the metal content of lead (Pb), zinc (Zn), tin (Sn) and nickel (Ni) in waste circuit boards is very important for understanding the content of waste circuit boards. Recycling value and determining t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 郭萌孔德明彭建军
Owner 江西华赣瑞林稀贵金属科技有限公司
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