空气中 N,N-二甲基环己胺的采样与分析测定

Sampling and analytical determination of airborne N,N-dimethylcyclohexylamine.

作者信息

Fitzpatrick M R, Warner P O, Thiel D P, Lubs P L, Kerfoot E J

出版信息

Am Ind Hyg Assoc J. 1983 Jun;44(6):425-7. doi: 10.1080/15298668391405076.

Abstract

A method has been developed for the collection on a reactive surface and subsequent analytical determination of airborne N,N-dimethylcyclohexylamine (DMCA). DMCA from ambient or test atmosphere is collected on a Tenax sorbent sample tube treated with hydrochloric acid (HCl) using a low flow, personal sampling pump. The Tenax sorbent sample tube is desorbed with tetrahydrofuran (THF) and sodium hydroxide (NaOH) and the resulting solution is analyzed on a gas chromatograph/mass spectrometer (GC/MS) using selected ion monitor. The peak areas for ions 84 and 127 are integrated and compared to standards. It is shown that collected samples are stable at room temperature for more than 50 days. This method was proven in the laboratory using concentrations in air from 1.0 ppm to 4.1 ppm.

摘要

已开发出一种在反应性表面收集并随后对空气中的N,N-二甲基环己胺（DMCA）进行分析测定的方法。使用低流量个人采样泵，将来自环境或测试大气中的DMCA收集在用盐酸（HCl）处理过的Tenax吸附剂采样管上。用四氢呋喃（THF）和氢氧化钠（NaOH）对Tenax吸附剂采样管进行解吸，然后使用选择离子监测器在气相色谱/质谱仪（GC/MS）上对所得溶液进行分析。对离子84和127的峰面积进行积分并与标准品进行比较。结果表明，收集的样品在室温下50多天内保持稳定。该方法已在实验室中得到验证，使用的空气中浓度范围为1.0 ppm至4.1 ppm。