“…Another device for operation with high vacuum systems permits introduction of micro gas samples (482). Other devices were described for withdrawing gas samples from the photolysis of acetone (560) and for preparing standard gas 66 A number of injection port modifications have been described including an all-glass unit {51), a port that is fitted within the column oven {85) and several ports which are modified versions of commercial apparatus {854, 405). Adler {14) evaluated a variety of elastomeric septums for their suitability in quantitative analysis by GC. Trapping.…”