Method for rapidly measuring content of chromium in copper or copper alloy

Abstract

The invention provides a method for rapidly measuring the content of chromium in copper or copper alloy. The method comprises the steps of 1 preparing a solution to be measured: weighing a sample of copper or copper alloy, putting the sample into a beaker, adding hydrochloric acid, and uniformly mixing; adding nitric acid, heating and dissolving until the solution is nearly dry, slightly cooling, supplementing the mixed acid, cooling to room temperature, and fixing the volume to obtain a solution to be detected; 2 preparing a series of standard solutions according to sample components, and preparing a standard working curve; and 3 detecting the solution to be measured through an inductively coupled plasma emission spectrometer to obtain the chromium content in the solution to be measured. According to the measuring method provided by the invention, a rapid quantitative analysis method for the chromium content in the copper and the copper alloy by adopting the inductively coupled plasma emission spectrometry is established, and the measuring method is short in test period, relatively high in sensitivity, relatively wide in dynamic linear range, relatively low in detection limit and relatively accurate in detection result; and detection and control of the chromium content in the research, development and production processes of the copper and the copper alloy can be met.

Description

technical field [0001] The invention relates to the technical field of metal detection and analysis, in particular to a rapid determination method for chromium content in copper or copper alloy. Background technique [0002] The source of chromium in copper and copper alloys is an artificially added chromium, represented by chrome-copper and chromium-zirconium-copper alloys, which are widely used in high-tech fields and have high strength, high electrical conductivity, thermal conductivity, and wear resistance The other is non-artificially added trace chromium element, which exists in raw materials. When producing copper and copper alloy finished and semi-finished products, chromium is a key control element. Once the chromium element exceeds the standard , the product will face the risk of recasting, which will bring significant economic losses to the producer. When detecting the content of chromium in copper or copper alloys, some enterprises will use direct reading spectr...

AI Technical Summary

Problems solved by technology

The main reason is that chromium is difficult to dissolve. When the sample is dissolved, high-viscosity sulfuric acid, phosphoric acid, perchloric acid, etc. are added, which causes a series of complex matrix effects, salt effects, etc., resulting in large matrix interference and low sensitivity. High limit

In some methods, a certain concentration of hydrofluoric acid is added to help dissolve, so as to completely dissolve the chromium content in the sample. In fact, the residual hydrofluoric acid will corrode the atomizer, spray chamber, rectangular tube, etc. of precision testing equipment. In the same system, in order to protect the equipment from being corroded by hydrofluoric acid, saturated boric acid is used to neutralize residual hydrofluoric acid, and a hydrofluoric acid-resistant atomizer is used, but the atomization effect is not as good as that of a glass high-salt atomizer Superior, resulting in low method sensitivity and high detection limits

[0008] To sum up, the current test methods for chromium content in copper and copper alloys are highly specific, with small measurement range, complicated operation, and high reagent consumption, resulting in long test cycle, high test cost, large personnel investment, low test efficiency, and cannot be quickly and efficiently tested. Efficiently control the need for accurate measurement of chromium content in the production of copper and copper alloys, which poses a great risk to product quality control

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