Method for determining copper, lead, zinc and cadmium elements in ionic type rare earth mineral slag through microwave digestion-ICP-OES

A -ICP-OES, ionic rare earth technology, applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problems of no detection, achieve environmental protection reality, consume less reagents, and improve the measurement results accurate effect

Inactive Publication Date: 2018-08-28
广西冶金研究院有限公司
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  • Application Information

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Problems solved by technology

At present, there is no literature report on the determination of copper, le

Method used

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  • Method for determining copper, lead, zinc and cadmium elements in ionic type rare earth mineral slag through microwave digestion-ICP-OES
  • Method for determining copper, lead, zinc and cadmium elements in ionic type rare earth mineral slag through microwave digestion-ICP-OES
  • Method for determining copper, lead, zinc and cadmium elements in ionic type rare earth mineral slag through microwave digestion-ICP-OES

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Embodiment Construction

[0033] The present invention is illustrated in detail below by examples.

[0034] 1. The instrument used in the present invention

[0035] Optima 8000 Inductively Coupled Plasma Emission Spectrometer, PerkinElmer, USA; Touchwin2.0 High-throughput Intelligent Microwave Digester, Aopule Technology Group (Chengdu) Co., Ltd.; AL204 Electronic Balance, Mettler-Toledo Instruments (Shanghai ) Ltd.

[0036] 2. Reagents used in the experiment

[0037] Single standard stock solution of copper, lead, zinc and cadmium, 1000 μg / mL; hydrochloric acid, nitric acid, perchloric acid and hydrofluoric acid, high-grade pure; experimental water is double distilled water.

[0038] 3. Experimental steps

[0039] 3.1 Sample processing

[0040] Weigh 0.5005g sample and put it into the digestion tank, blow a little distilled water along the tank wall, blow the sample into the bottom of the tank, add 8 mL of inverse aqua regia (HCl:HNO3=1:3), then add 2 mL of HF, and tighten the lid of the digestion...

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Abstract

The invention relates to a method for determining contents of copper, lead, zinc and cadmium in ionic type rare earth mineral slag. The method for determining the contents of copper, lead, zinc and cadmium in the ionic type rare earth mineral slag through microwave digestion-ICP-OES comprises the following steps: carrying out microwave digestion on an ionic type rare earth mineral slag sample through 8mL of lefort and 2mL of hydrofluoric acid; adding 2mL of HClO4 into a digestion tank and putting HClO4 in an acid repelling apparatus; repelling acid at 160 DEG C to ensure that HClO4 is nearly dried; cooling HClO4 and adding 5mL of HCl(1+1) to be transferred and fixing the volume into a 50mL of volumetric flask. A sample blank and the solution are formed aerosol through an inductively coupled plasma atomic emission spectrometer atomizer, and the aerosol is loaded into a high-temperature high-frequency plasma by argon gas, so that ionization is generated and characteristic spectrum is produced, the spectral line intensity of the copper, lead, zinc and cadmium elements in the sample blank and the solution are tested, and the strength of the various elements is in direct proportion to the contents of the elements; therefore, by using a calibration curve method, quantitative determination is carried out, and the contents of the copper, lead, zinc and cadmium elements in cosmetics arecalculated. The method has the characteristics of good determination stability, high sensitivity, and accurate results.

Description

technical field [0001] The invention belongs to the field of analysis and testing, and relates to a method for determining copper, lead, zinc and cadmium elements in ion-type rare earth slag, in particular to a method for measuring ion-type elements using microwave digestion-inductively coupled plasma emission spectrometry (ICP-OES). The detection method of copper, lead, zinc and cadmium elements in rare earth slag. Background technique [0002] At present, the proven industrial reserves of ion-type rare earth mines in the South are 1.5 million tons, and the prospective reserves are 50 million tons, accounting for 80% of the world's medium and heavy rare earth reserves. The mining of ion-type rare earth ores has experienced three generations of development processes: pool leaching, heap leaching, and in-situ leaching. The in-situ leaching process has the advantages of low mining cost, large output, and fast speed. It is currently a mature mining process for mining ion-adsor...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N21/73
CPCG01N1/44G01N21/73
Inventor 黄易勤黄超冠陈小雁苟瑞孟映霞覃雪凤林凌宇陈曼谭秋红覃辉平伍立群卢燕平甘露黄阳
Owner 广西冶金研究院有限公司
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