Preparation method of organic sulfur isotope detection sample, and detection method of organic sulfur isotope

Abstract

The invention provides a preparation method of an organic sulfur isotope detection sample. The preparation method comprises the following steps: (1) converting organic sulfur in an organic matter rawmaterial into barium sulfate; (2) enabling the barium sulfate to react in solid acid phosphate and hydroiodic acid to generate hydrogen sulfide gas; (3) moving out the hydrogen sulfide gas and absorbing the hydrogen sulfide gas by an alkaline solution to obtain an absorption solution; and (4) adding a silver salt solution into the absorption solution to convert the sulfur in the absorption solution into silver sulfide precipitates. The invention also provides a method for detecting an organic sulfur isotope in the organic matter raw material. The detection method comprises the steps of preparing the detection sample according to the preparation method, and detecting the sample by adopting an SF6 method.

Description

technical field [0001] The invention relates to the field of geochemistry, in particular to a method for preparing an organic sulfur isotope detection sample, an organic sulfur isotope detection sample prepared by the method, and the sample used to indicate organic sulfur in organic matter 33 S, 36 Method for S isotope content. Background technique [0002] The four elements, carbon, sulfur, nitrogen, and phosphorus, participate in the global interconnected oxidation-reduction geochemical cycles, which are closely related to the change of the earth's environment and the burial-preservation of marine organic matter. [0003] Organic-rich shale and carbonate formations are widely distributed, among which sulfur-containing organic compounds-organic sulfur is an important component. Current studies have recognized that the sulfur in bitumen, heavy oil, and condensate in oil and gas reservoirs is different from hydrocarbon elements, which can come from dispersed organic matter ...

AI Technical Summary

Problems solved by technology

Using this method for organosulfur to silver sulfide 33 S, 36 In the sample preparation of S isotope, sulfur fractionation is obviously one of the difficult problems in the conversion process of barium sulfate to silver sulfide, that is, in the obtained silver sulfide sample 33 S and 36 S content and barium sulfate 33 S and 36 There is a large difference between the S content, resulting in the preparation of silver sulfide samples still do not have the indicator organic matter 33 S and 36 Credibility and application value of S content

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