Method for quickly separating copper matrix for ICP-MS analysis of impurity elements in metal copper

Abstract

The invention relates to a method for quickly separating a copper matrix for ICP-MS analysis of impurity elements in metal copper, which comprises the following steps: digesting a metal copper sampleby using a mixed acid solution of nitric acid and sulfuric acid (a small amount) in a certain ratio, and removing the copper matrix by using a high-current quick electrolysis method to obtain a solution to be detected; and then adopting inductively coupled plasma mass spectrometry (ICP-MS) to realize rapid and simultaneous determination of twelve impurity elements of arsenic, antimony, tellurium,tin, lead, zinc, iron, nickel, cobalt, chromium, cadmium and manganese in the to-be-detected solution under certain instrument working conditions. Compared with the national standard GB / T 5121.28-2010, the method has the advantages that the separation effect is good, the matrix interference is eliminated, the twelve impurity elements of arsenic, antimony, tellurium, tin, lead, zinc, iron, nickel,cobalt, chromium, cadmium and manganese can be rapidly and simultaneously determined, the measurement time is short, and the requirement of rapid analysis of the twelve trace impurity elements in themetal copper is met.

Description

technical field [0001] The invention relates to the field of element analysis, in particular to a method for rapidly separating copper substrates for ICP-MS analysis of impurity elements in metallic copper. Background technique [0002] Arsenic, antimony, tellurium, tin, lead, zinc, iron, nickel, cobalt, chromium, cadmium, manganese and other impurity elements in metallic copper have an impact on the performance and processing performance of copper. The chemical composition has a maximum limit, and corresponding national standards have also been formulated. However, with the rapid development of science and technology, these methods are increasingly showing their shortcomings. [0003] Current national standard for analysis methods of copper and copper alloys GB / T 5121.28-2010 "Methods for Chemical Analysis of Copper and Copper Alloys Part 28: Chromium, Iron, Manganese, Cobalt, Nickel, Zinc, Arsenic, Selenium, Silver, Cadmium, Tin, Antimony , Tellurium, Lead, and Bismuth D...

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Problems solved by technology

[0003] Current national standard for analysis methods of copper and copper alloys GB / T 5121.28-2010 "Methods for Chemical Analysis of Copper and Copper Alloys Part 28: Chromium, Iron, Manganese, Cobalt, Nickel, Zinc, Arsenic, Selenium, Silver, Cadmium, Tin, Antimony , Tellurium, Lead, and Bismuth Determination Inductively Coupled Plasma Mass Spectrometry" stipulates that the sample is dissolved in nitric acid, and the inductively coupled plasma mass spectrometry is used to directly determine chromium, iron, manganese, cobalt, nickel, zinc, arsenic, selenium, The content of silver, cadmium, tin, antimony, tellurium, lead, and bismuth, but the elements selenium and tellurium need to use lanthanum hydroxide as a co-precipitant to separate from the copper matrix and be enriched for determination. There are long operating procedures, many types of reagents, and Matrix interference, unable to simultaneously determine twelve elements such as arsenic, antimony, tellurium, tin, lead, zinc, iron, nickel, cobalt, chromium, cadmium, and manganese

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