METHOD OF GAS CHROMATOGRAPHIC ANALYSIS WITH USE OF CAPILLARY COLUMNS Russian patent published in 2002 - IPC

FIELD: gas chromatography. SUBSTANCE: in agreement with proposed method fixed quantities of non-sorbing gaseous substance and analyzed liquid substances are metered in chromatographic column for separation and change of their concentration in flow of carrier gas is measured across outlet from column. Analyzed liquid substances are dissolved in non-volatile liquid through which non-sorbing gaseous substance is bubbled, vapor and gas flow is diluted across outlet from bubbler with carrier gas in certain proportion and metering loop of fixed volume is filled at temperature excluding condensation of vapors of analyzed liquid substances. Content of loop is transferred into capillary column by flow of carrier gas and analysis is conducted under conditions of programming of column temperature with initial temperature providing for condensation of analyzed liquid substances. EFFECT: increased accuracy of chromatographic measurement and separation efficiency. 1 dwg, 1 tbl