Phosphine is a colorless gas very lively. In the light, air and other effects, is very easy to convert to other forms of phosphorus. For a long time, there has been controversy for phosphine in the biogeochemical cycle of phosphorus in effect. With phosphine research in-depth, phosphine as atmospheric widespread gas has been the recognition of the, but because of its low concentration, using traditional methods cannot make
Atmospheric environment in the presence of trace phosphine was determined in Tengzhou City Xiangying Analysis Technology Co., Ltd. using pre column twice with cold trapping enrichment and XiangyingGC7990plus gas phase chromatography with nitrogen phosphorus detector GC7990 NPD method; in the original cold trapping enrichment device equipped with a temperature control instrument and jacketed cold trap temperature control, on-line monitor and control the phosphine concentration temperature, and can choose different temperature range with the anaerobic
environment widespread methane gas separation. The detection limit is 1.25 * 10-2pg.
磷化氢是十分活泼的无色气体。在光照、空气等作用下,极易转化为磷的其它形态。长期以来,对于磷化氢在磷的生物地球化学循环中的作用一直存在争议。随着磷化氢研究的深入,磷化氢作为大气中普遍存在的气体已经得到了各方面的承认,但由于其浓度过低,用传统的方法不能做出
滕州市翔鹰分析技术有限公司采用柱前两次冷阱富集和XiangyingGC7990plus气相色谱 -氮磷检测器 (GC7990 -NPD)法 ,测定了大气环境中存在的痕量磷化氢 ;在原有的冷阱富集装置中配置温度控制仪和夹套冷阱控温 ,可在线检测并控制磷化氢的富集温度 ,并可选择不同的温度范围将其与厌氧环境中普遍存在的甲烷气体分离 ;该法的检出限为1.25×10-2pg。
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