Gas chromatographic retention indices for the N-methyl-N-substituted benzamides on capillary columns

摘要

Gas chromatographic retention indices (I) for series of 20 synthesized N-methyl-N-substituted benzamides on DB-1, DB-5 and DB-WAX capillalry columns isothermal at 170, 190 and 210 deg C, and using temperature programmed gas chromatograhy (TPGC) have been determined within standard deviation of 0.6 i.u. The isothermal data obtained on these columns and TPGC data are compared and a comparison of the retention indices, #DELTA#I and dI/dT values presented as linear regressoin equations with the correlation coefficient greater than 0.9970 within standard deviation of 0.6 i.u. The best resolution of the structural isomers is obtained using DB-1 capillary column.