ANALYTICAL COMPLEX AND METHOD OF OPERATION THEREOF FOR ANALYSIS OF TOTAL AND INDIVIDUAL CONTENT OF HYDROCARBONS IN SAMPLES OF OIL-BEARING ROCKS BY PYROLYSIS CHROMATOGRAPHY Russian patent published in 2020 - IPC G01N33/24 

FIELD: chemistry.

SUBSTANCE: present invention relates to analysis of materials, in particular to method and complex of analysis of total and individual content of hydrocarbons in samples of oil-bearing rocks. Analytical system for analysis of total and individual content of hydrocarbons (HC) in samples of oil-bearing rocks consists of: gas chromatograph (GC) containing: first thermostat formed by inner GC volume; evaporator with installed pyrolytic cell, providing thermal desorption and/or pyrolysis of oil-bearing rock sample; cryogenic trap providing collection of thermal desorption and pyrolysis products at sample heating stage; a chromatographic column which provides HC separation and connected to the cryogenic trap; a second thermostat to program temperature of the chromatographic column; Dean switch, connected to GC evaporator and chromatographic column, providing redirection of flow with thermodesorption products or sample pyrolysis into channel with chromatographic column or directly into MSD; a flow divider combining the streams with the sample from different channels into one channel for transmission to the MSD; MSD connected to the GC and providing HC detection in the sample; a source of feeding liquid nitrogen, connected to a cryogenic trap, which provides cryofocusing of thermal desorption and pyrolysis products in the initial section of the column for their complete subsequent separation; a computing control device connected to the GC; wherein the sample is analyzed in switchable modes of operation of the complex, in which analysis is carried out with programmable pyrolysis temperature (EGA-MS) to record the total weight of free hydrocarbons (S1) and the HC pyrolysis (S2) and calculation of temperature of cracking of organic substance Tmax, as well as pyrolysis gas chromatography (PY-GC/MS) for individual analysis of HC types in each temperature zone of thermal desorption and pyrolysis.

EFFECT: technical result is broader functional capabilities for analysis of hydrocarbons in samples of oil-bearing rocks.

9 cl, 6 dwg