Multi-element simultaneous determination method for trace elements in copper-chromium electrical contact material

Abstract

The invention relates to a multi-element simultaneous determination method for trace elements in a copper-chromium electrical contact material. The method comprises the following specific steps of: preparing a mixed standard solution, preparing a working curve solution, digesting a sample, and determining on a machine. By adopting the method, digested hydrochloric acid and hydrogen peroxide are used for digesting a sample on an electric hot plate, the problem that a copper-chromium electrical contact material is difficult to dissolve completely is solved, high-purity copper and high-purity chromium are used for matrix matching to make a working curve, the interference of high-content chromium on a to-be-detected element is eliminated, an optimal analysis line of each element is selected on an inductively coupled plasma emission spectrometer, background correction is carried out, according to a linear relation between spectral line intensity and element content, the content of 10 trace elements including aluminum, iron, nickel, cobalt, calcium, magnesium, manganese, zinc, silicon and lead in the copper-chromium electrical contact material is measured at the same time, the detection period is short, the operation process is simple, reagent consumption is low, the method is suitable for batch detection, and the blank of a method for simultaneously determining and analyzing a plurality of trace elements in the copper-chromium electrical contact material is filled.

Description

technical field [0001] The invention relates to the field of chemical analysis, in particular to a multi-element simultaneous determination method for trace elements in copper-chromium electrical contact materials. Background technique [0002] Copper-chromium alloys with high chromium content are widely used as contact materials in medium and high voltage vacuum interrupters due to their excellent electrical conductivity, thermal conductivity, voltage resistance, arc ablation resistance, breaking current performance, and oxygen absorption. According to the different proportions of copper-chromium elements, the current common copper-chromium electrical contact materials are CuCr25, CuCr30, CuCr35, CuCr40, CuCr45, and CuCr50. [0003] The chemical composition of the copper-chromium electrical contact material is very important to the material performance. In addition to the two main components of copper and chromium, other trace elements also have different effects on the mat...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a multi-element simultaneous determination method of trace elements in copper chromium electrical contact materials, using dilute hydrochloric acid and hydrogen peroxide to digest the sample on the electric heating plate, to solve the problem of copper chromium For the problem that the electrical contact material is difficult to dissolve completely, use high-purity copper and high-purity chromium for matrix matching to make a working curve, solve the interference of high-content chromium on the measured elements, and select the best analysis of each element on the inductively coupled plasma emission spectrometer Line, and background correction, according to the linear relationship between the intensity of the spectral line and the element content, simultaneously determine aluminum, iron, nickel, cobalt, calcium, magnesium, manganese, zinc in copper-chromium electrical contact materials in copper-chromium electrical contact materials , silicon, lead 10 kinds of trace elements, short detection period, simple operation process, less reagent consumption, suitable for batch detection, filling the vacancy of simultaneous determination and analysis of multiple trace elements in copper chromium electrical contact materials

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