Personal sampler for NOx.
Personal sampler for NOx.
复制标题
氮氧化物个人采样器。
DOI：
10.1080/15298667991430028
复制
发表时间：
1979
期刊：
影响因子：
--
通讯作者：
C. Tomczyk
中科院分区：
文献类型：
--
作者：
E. Palmes;C. Tomczyk
开发了用于监测工作场所空气的NOx （NO + NO2）和NO2个人采样系统。本实验室先前报告的二氧化氮采样器使用三乙醇胺捕获通过适当尺寸的管扩散的二氧化氮。NOx取样器包含与NO2装置相同的元素，但它也配备了铬酸浸渍盘；该圆盘将NO转化为NO2，然后由三乙醇胺与预成型的NO2一起捕获。在所有情况下，捕获的NO2都被确定为亚硝酸盐，而NO是通过NOx和NO2值之间的差来测量的。如果铬酸盘放置24小时或更短时间，则NOx采样器可提供准确且可重复的结果；因此，有必要在取样前后相当短的时间内插入和取出光盘。但是，我们相信这个操作对用户来说不会是一个严重的问题。
A personal sampler system for NOx (NO + NO2) and NO2 has been developed for monitoring workplace air. The NO2 sampler previously reported from this laboratory uses triethanolamine to trap NO2 which diffuses through a tube of appropriate dimensions. The NOx sampler contains the same elements as the NO2 device, but it is also fitted with a chromic acid impregnated disc; this disc converts NO to NO2 which is then trapped by the triethanolamine along with preformed NO2. The trapped NO2 in all cases is determined as nitrite colorimetrically and NO is measured by difference between the NOx and NO2 values. The NOx sampler gives accurate and reproducible results if the chromic acid disc is in place for 24 hours or less; it is necessary, therefore, to insert and remove the disc within reasonably short times before and after sampling. We believe, however, that this operation will not be a serious problem for the user.