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

A technology of ICP-MS and impurity elements, which is applied to the analysis of materials, the preparation of test samples, and the analysis of materials by electromagnetic means. Analysis, no matrix interference, and the effect of reducing the amount of use

Inactive Publication Date: 2019-12-10
北矿检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Experimental program
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Embodiment

[0025] 1) Take 20mL of mixed acid in a 200mL volumetric flask, dilute to volume with water, and shake well. as a blank solution.

[0026] 2) Accurately weigh 2.00g of sample as the sample to be analyzed.

[0027] 3) Put the sample to be tested into a 150mL tall beaker, add 20mL mixed acid solution and heat until completely dissolved, add 100mL ultrapure water, and stir well. Install the platinum cathode and platinum anode on the electrolyzer properly and put them into the solution, and cover the tall beaker with two and a half watch glasses. Perform electrolysis at a current density of about 3-3.5A / dm2 on the surface of the cathode until the solution is colorless (about 1-2h). Without cutting off the current, remove the two and a half watch glasses, pull out the platinum electrode, and Wash off with water. Transfer the solution in the beaker to a 200mL volumetric flask, make up to volume with ultrapure water, and prepare the solution to be tested.

[0028] 4) Standard solu...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N27/62G01N27/626
CPCG01N1/28G01N27/62
Inventor 冯先进杨斐史烨弘韩鹏程赵振李瑞华房胜楠董璐李华昌
Owner 北矿检测技术股份有限公司
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