Sample plug tailing and cold trap effect in hot split sampling
Sample plug tailing together with a cold trap effect brings about discrimination against low boiling components at an initial column temperature above the boiling point of the solvent. In conventional split injection, this compensates for the opposite effects of such factors as the gas phase viscocity change and the pressure wave during the split period, and reasonable results are obtained. In stop-flow injection, however, since the influences of the opposite factors are diminished, the sample plug tailing and the cold trap effect may produce results showing lower than true concentrations for the low boiling components.
Key WordsGas chromatography Capillary columns Split injection Sample tailing and cold trap effects
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- G. Liu, Z. Xin, Chromatographia,28, 385 (1989).Google Scholar