Method for measuring rare and scattered geological elements such as germanium and tellurium by HG-ICP-MS

Abstract

The invention discloses a method for measuring rare and scattered geological elements such as germanium and tellurium by HG-ICP-MS. The method comprises: 1, weighing a geological sample, putting the sample in a polytetrafluoroethylene inner tank for closed dissolution of the sample, and pre-treating the geological sample, 2, preparing a hydride reaction system, respectively introducing the sample, an acid solution and an alkali solution into the reaction system, carrying out gas-liquid separation on the produced hydride, feeding the separated hydride into plasma by carrier gas and carrying out determination, and 3, acquiring a calibration curve and method detection limits, and calculating Ge and Te detection limits according to 3-fold standard deviation and a sample dilution factor of 1000. The method has high sensitivity and stability of analysis signal acquisition, produces relative standard deviations of Ge and Te signal intensity of 8.3% and 2.1% after continuous detection 20 times, produces the Te detection limit lower than a detection limit of 0.1 micrograms per gram directly detected by an open four-acid sample solution ICP-MS method and can be applied to analysis of an actual sample and give accurate results.

Description

technical field [0001] The invention belongs to the technical field of geological component determination, and in particular relates to a method for measuring rare elements germanium and tellurium in geological matter by HG-ICP-MS. Background technique [0002] Both germanium and tellurium are scattered elements, also known as dispersed elements. They do not form independent deposits in nature, but are dispersed in minerals of other elements in the form of impurities, also known as dispersed elements. Their content in the earth's crust is very low, and their distribution is very scattered. Most of them are associated with non-ferrous metals, coal and iron ore. In recent years, with my country's emphasis on the investigation and prospecting of the strategic resources of the three rare metals, there are more and more studies on the analysis methods of germanium and tellurium, mainly focusing on their separation and enrichment. Some scholars have studied that adding a small am...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a HG-ICP-MS method for the determination of rare elements germanium and tellurium in geology, aiming to solve the problem of inaccurate analysis results in the existing methods for the determination of rare elements germanium and tellurium in geology

①Provide the possibility for accurate determination of rare elements germanium and tellurium in existing geological samples

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