METHOD FOR IDENTIFICATION AND QUANTITATIVE DETERMINATION OF ORGANOCHLORINE COMPOUNDS Russian patent published in 2022 - IPC G01N30/78 

FIELD: analytical industry.

SUBSTANCE: invention relates to the field of analytical chemistry, namely to a method for identifying and quantifying organochlorine compounds in oilfield chemicals. The method for identification and quantitative determination of organochlorine compounds (OCC) in oilfield chemicals includes: sampling of a liquid oilfield chemical agent and dosing of a sample for vapor phase input of a sample in a volume of 5 mcl to 1 ml, and if the content of OCC in a sample of a liquid oilfield chemical is less than 0.1 mg/kg, then the sample is dosed in the volume from 5 to 50 mcl; if the OCC in a sample of a liquid oilfield chemical contains from 0.1 mg/kg or more, then the sample is dosed in a volume of 50 mcl to 1 ml; the sample of a liquid oilfield chemical is transferred to the gas phase and the gas phase of the sample of an oilfield chemical is injected into a gas chromatograph equipped with a quadrupole mass spectrometric analyzer and an electronic capture detector (ECD); obtaining chromatographic ECD data and chromatographic data of a quadrupole mass spectrometric analyzer; determination of the group of organochlorine compounds contained in the sample of an oilfield chemical agent based on ECD chromatographic data; determination of the organochlorine compound included in the group of organochlorine compounds, which was determined at the previous stage, and determination of the mass fraction of the organochlorine compound in the sample of an oilfield chemical agent, based on chromatographic data of the quadrupole mass spectrometric analyzer.

EFFECT: increase in the accuracy and reliability of determining the quantitative content of organochlorine compounds present in oilfield chemicals, the absence of complex preliminary sample preparation and high data acquisition rate.

12 cl, 2 dwg, 2 tbl