Tangerman A
J Chromatogr. 1986 Sep 24;366:205-16. doi: 10.1016/s0021-9673(01)93468-5.
A gas chromatographic technique is described for measuring various volatile sulphur compounds (H2S, COS, CS2, thiols, sulphides, disulphides) in air at the parts per trillion level. The sulphur compounds are trapped and concentrated at -196 degrees C in a small glass tube filled with the porous polymer Tenax GC. The excess of water in the air samples is pretrapped by calcium chloride, which drying agent does not adsorb any of the sulphur volatiles. The Tenax trap tube fits exactly in the injection port of the gas chromatograph, where the adsorbed sulphur compounds are liberated at 200 degrees C directly into the carrier gas stream and are transferred to the gas chromatographic column. The sulphur compounds are then assayed by means of a flame photometric detector. The Tenax trap tubes can be stored at -196 degrees C for more than 1 week without any loss of sulphur volatiles.
本文描述了一种气相色谱技术，用于测量空气中万亿分之一水平的各种挥发性硫化合物（硫化氢、羰基硫、二硫化碳、硫醇、硫化物、二硫化物）。硫化合物在装有多孔聚合物Tenax GC的小玻璃管中于-196℃下捕集和浓缩。空气样品中的过量水分由氯化钙预先捕集，该干燥剂不会吸附任何硫挥发性物质。Tenax捕集管恰好适配于气相色谱仪的进样口，吸附的硫化合物在200℃下直接释放到载气流中，并转移至气相色谱柱。然后通过火焰光度检测器对硫化合物进行测定。Tenax捕集管可在-196℃下储存超过1周而不会损失任何硫挥发性物质。
