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Sample preparation method for pyrite sulfur isotope analysis of geological sample

A technology for geological samples and sulfur isotopes, applied in the field of rock and mineral analysis and testing, can solve problems such as environmental pollution and large errors, and achieve the effects of environmental friendliness, simple operation and saving material consumption.

Inactive Publication Date: 2013-03-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0002] In the study of paleo-ocean and paleo-environment, it is necessary to specifically extract the sulfur in pyrite in geological samples, so as to realize the research on pyritization and iron components. The separation and extraction of sulfur in the process of mineral sulfur isotope analysis all adopt offline methods, which have the problems of large errors and environmental pollution

Method used

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Experimental program
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Embodiment Construction

[0015] a. Preparation of CrCl2 solution

[0016] CrCl 3 Dissolve in 1-2 mol / L hydrochloric acid to prepare CrCl with a concentration of 1 mol / L 3 Solution, add 20-30 mL of CrCl with a concentration of 1mol / L in the separatory funnel 3 solution, then add an equal volume of hydrochloric acid solution with a mass percentage concentration greater than 30%, and then add a sufficient amount of Zn particles to ensure that the Zn particles and CrCl 3 The ratio of the amount of substances is greater than 1, and the nitrogen gas reacts. As the reaction continued, the color of the solution in the separatory funnel gradually changed from green to blue, and when the color of the solution turned to transparent blue, it proved that CrCl 3 Has basically converted to CrCl 2 , the blue CrCl 2 The solution is added to the reaction vessel for sulfide removal.

[0017] b. Removal of non-pyrite sulfur from geological samples

[0018] in CrCl 2 During the preparation of the solution, the r...

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Abstract

The invention relates to a sample preparation method for pyrite sulfur isotope analysis of a geological sample. The sample preparation method comprises the following steps of: preparing CrCl2, removing non-pyrite sulfide in the geological sample, and extracting pyrite sulfur in the geological sample, wherein H2S gas generated in reaction is always at an enclosed environment. The method can be used for fully separating and extracting sulfur of pyrite in the geological sample, and the obtained Ag2S can effectively reflect the sulfur isotope composition of pyrite in the geological sample, can be used for quantitatively measuring the pyrite content, and is used for the research of pyritization and iron components and the like. The operation of the technical scheme provided by the invention is simple, and can be completed at one time according to reaction requirements and sequence, so the sample preparation method for pyrite sulfur isotope analysis of the geological sample has the advantages of material consumption conservation, reaction time reduction, high reaction efficiency and environment friendliness.

Description

technical field [0001] The invention relates to a sample preparation method for pyrite sulfur isotope analysis in geological samples, and belongs to the technical field of rock ore analysis and testing. Background technique [0002] In the study of paleo-ocean and paleo-environment, it is necessary to specifically extract the sulfur in pyrite in geological samples, so as to realize the research on pyritization and iron components. The separation and extraction of sulfur in the process of mineral sulfur isotope analysis all adopt offline method, which has the problems of large error and environmental pollution. Contents of the invention [0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a sample preparation method for pyrite sulfur isotope analysis in geological samples. The method is simple to operate and realizes multi-step online completion at one time, which can save material consumption and reaction time, Im...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 宋虎跃邱海鸥王大波朱园园汤志勇宋海军
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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