NITROUS-OXIDE AS CARRIER GAS IN CAPILLARY GAS-LIQUID-CHROMATOGRAPHY

On use of nitrous oxide as carrier gas the retention factors of the ch romatographed compounds decrease linearly with increasing average colu mn pressure, Other retention characteristics (relative retention, rete ntion index) change linearly, This effect was demonstrated by using a capillary column coated with nonpolar polydimethylsiloxane phase SE-30 . As shown for capillary GLC the linear correlation is valid for the s ame column: k(i)(G(1),P-1) = A k(i)(G(2),P-2) + B, where ki(G1,P1) and ki(G2,P2) are the retention factors of compound i at average column p ressures P-1 and P-2 when using carrier gases G(1) and G(2), respectiv ely; A and B are coefficients.