Micro component laser ablation isotope analyzing device and method

Abstract

The invention provides a micro component laser ablation isotope analyzing device and a micro component laser ablation isotope analyzing method, and belongs to the field of analysis of organic components of measured rock samples. The device comprises a laser device, a microscope, a sample cell, a high-temperature oxidation furnace, a cold trap, an isotope mass spectrometer and the like. Organic micro components in the sample cell are observed and found under the microscope and gasified and released by laser ablation, the released organic components are oxidized into carbon dioxide and water through the high-temperature oxidation furnace, the carbon dioxide is enriched in the cold trap, the carrier gas carrying the carbon dioxide enters the isotope mass spectrometer and is detected and analyzed, and the isotope values of the micro components of various organic substances are determined. By using the device, mixing of different rock component isotopes is effectively avoided, the geologic interpretation precision is improved, more targeted organic geochemical information is provided, and the oil-gas geological exploration is better served.

Description

Technical field [0001] The invention belongs to the field of analyzing the organic components of rock samples, and specifically relates to a laser ablation isotope analysis device and method for microscopic components. Background technique [0002] The organic matter components in rock samples are widely used in the research field of petroleum organic geochemistry. From the perspective of analysis objects, they can be divided into three types: soluble part (extract), insoluble part (kerogen) and whole rock analysis (such as thermal Solution analysis, isotope analysis, etc.), these organic geochemical application analysis methods can provide molecular composition data of organic fossils (such as coal, source rock, oil shale, kerogen, etc.). details as follows: [0003] 1. The analysis of the soluble part of the rock is that the large rock sample is crushed and extracted with a polar solvent (such as chloroform, etc.) to obtain asphalt A. Asphalt A can be separated by column chromat...

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Problems solved by technology

However, the problem with this method is that the manual selection of organic microscopic components is generally difficult to achieve and labor-intensive, and the composition of the enriched components obtained by the centrifugal separation method is questionable.

After comparative study, it can be seen that none of the above-mentioned devices and methods can carry out the determination and analysis of isotopes of organic microscopic components.

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