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水中痕量有机物的气相色谱测定已有几种富集方法。把待测物萃取到少量(几克或十分之几克)的有机相中,或用收集柱将待测物吸收后用溶剂萃取富集,也有用收集柱吸收后再热解吸进样的。我们用居里点较低的镍丝涂上微量阿皮松L(APL),置试样中萃取痕量二甲苯后迅速装在色谱仪的居里点裂解头内,裂解器控制加热温度和时间,使二甲苯随APL的蒸发而气化进样,APL则冷凝留在色谱柱前加接的一段填上玻璃棉的预柱里。本方
There are several enrichment methods for the determination of trace organic compounds in water by gas chromatography. The analyte is extracted into a small amount (a few grams or a few tenths of grams) of the organic phase, or the analyte is absorbed by the collecting column and then extracted by a solvent, or absorbed by the collecting column, and then thermally desorbed . We use the lower Curie point nickel wire coated with a small amount of APS, set the sample was extracted trace xylene quickly installed in the Curie point of the pyrolysis head, the cracker to control the heating temperature and The xylene is gasified with the APL vaporization, and the APL condenses and remains in the pre-column filled with glass wool attached to the column. This side