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Method for determining trace elements in graphite by microwave digestion-ICP-OES (inductively coupled plasma-optical emission spectrometer)

A technology of -ICP-OES, medium and trace elements, which is applied in the field of microwave digestion-ICP-OES for the determination of trace elements in graphite, can solve the problems of complete immersion of trace elements in graphite samples, deviation of test results, etc., and achieve excellent high-temperature storage performance and speed Fast, fast and complete effect

Inactive Publication Date: 2018-12-11
KEDA (ANHUI) NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional test method is to use concentrated acid immersion, this method is difficult to completely soak out the trace elements in graphite samples, resulting in deviations in the test results, so a method that can effectively detect trace elements in graphite samples is needed

Method used

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  • Method for determining trace elements in graphite by microwave digestion-ICP-OES (inductively coupled plasma-optical emission spectrometer)
  • Method for determining trace elements in graphite by microwave digestion-ICP-OES (inductively coupled plasma-optical emission spectrometer)
  • Method for determining trace elements in graphite by microwave digestion-ICP-OES (inductively coupled plasma-optical emission spectrometer)

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Use an electronic balance to weigh 0.3008g of graphite and add it to the digestion tank, then add 6mL of aqua regia to the digestion tank, tighten the closed digestion tank and place it in a microwave digestion instrument for digestion; after the digestion is completed and cooled to room temperature, heat the digestion tank acid, then transfer the digestion solution in the digestion tank to a 50mL plastic volumetric flask, rinse the digestion tank with water for 3 times, transfer the rinsing solution to the 50mL plastic volumetric flask, and then shake to a constant volume with water to obtain the Solution; set the analysis conditions of the inductively coupled plasma emission spectrometer, measure the solution to be measured with the inductively coupled plasma emission spectrometer, input the mass of the graphite sample and the volume of the solution to be measured, and directly measure iron, cobalt, nickel, copper, aluminum, and chromium and zinc content, as shown in T...

Embodiment 2

[0043] Use an electronic balance to weigh 0.4g of graphite and add it to the digestion tank, then add 9mL of aqua regia to the digestion tank, tighten the closed digestion tank and place it in a microwave digestion instrument for digestion; after the digestion is completed and cooled to room temperature, heat the digestion tank acid, then transfer the digestion solution in the digestion tank to a 50mL plastic volumetric flask, rinse the digestion tank with water for 3 times, transfer the rinsing solution to the 50mL plastic volumetric flask, and then shake to a constant volume with water to obtain the Solution; set the analysis conditions of the inductively coupled plasma emission spectrometer, measure the solution to be measured with the inductively coupled plasma emission spectrometer, input the mass of the graphite sample and the volume of the solution to be measured, and directly measure iron, cobalt, nickel, copper, aluminum, and chromium and zinc content, as shown in Tabl...

Embodiment 3

[0046] Use an electronic balance to weigh 0.5008g of graphite and add it to the digestion tank, then add 12mL of aqua regia to the digestion tank, tighten the closed digestion tank and place it in a microwave digestion instrument for digestion; after the digestion is completed and cooled to room temperature, heat the digestion tank acid, then transfer the digestion solution in the digestion tank to a 50mL plastic volumetric flask, rinse the digestion tank with water for 3 times, transfer the rinsing solution to the 50mL plastic volumetric flask, and then shake to a constant volume with water to obtain the Solution; set the analysis conditions of the inductively coupled plasma emission spectrometer, measure the solution to be measured with the inductively coupled plasma emission spectrometer, input the mass of the graphite sample and the volume of the solution to be measured, and directly measure iron, cobalt, nickel, copper, aluminum, and chromium and zinc content, as shown in ...

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Abstract

The invention discloses a method for determining trace elements in graphite by microwave digestion-ICP-OES (inductively coupled plasma-optical emission spectrometer), and relates to the technical field of analytical chemistry. The method comprises the following steps of soaking a graphite sample by aqua regia, and digesting by microwaves, so as to obtain a to-be-determined solution; completely dissolving the metal elements into the to-be-determined solution, guiding the to-be-determined solution into an ICP emission spectrometer, determining the spectrum line intensities of the elements of iron, cobalt, nickel, copper, aluminum, chromium, zinc and the like in the to-be-determined solution, and then determining the specific contents of the elements of iron, cobalt, nickel, copper, aluminum,chromium, zinc and the like in the graphite sample according to the determined standard working curve. The method has the advantages that the defects of the prior art are overcome; the technical blank of using the microwave digestion-ICP atom transmission spectrum technique in determining of the contents of trace elements in the graphite in China is filled; the determining is the quick and precise; the contents of harmful trace elements in the graphite sample can be effectively monitored; a lithium ion battery using the graphite has excellent high temperature storage property.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a microwave digestion-ICP-OES method for determining trace elements in graphite. Background technique [0002] Lithium-ion batteries have received more and more attention in recent years due to their many advantages such as high working voltage, high energy density, long cycle life, and no memory effect. With the emergence of various new materials and the improvement of battery design technology, the application range of lithium-ion batteries continues to expand. Lithium-ion battery technology is not just an industrial technology, it is related to the development of the information industry and new energy industry, and has become an indispensable resource for modern and future military equipment. High reliability and high security have become the basic requirements for electronic equipment, especially military equipment, for lithium-ion batteries. However, in the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/44G01N21/73
CPCG01N1/44G01N21/73
Inventor 杨宁付健戴莹莹
Owner KEDA (ANHUI) NEW MATERIAL CO LTD
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