摘要
根据气体分子扩散原理研制成氨被动式个体监测器。用稀磷酸－甘油混合液浸渍的吸收层来吸收空气中的氨，采样后用靛酚蓝比色法分析，采样速率为１３６ｍｌ／ｍｉｎ，标准差为７、８ｍｌ／ｍｉｎ；与有动力的方法现场对比测定总不确定度为±１７％，最小可测浓度为５μｇ／ｍ３，可用于室内空气污染和个体接触量的监测。
This paper presents a passive ammonia personal moniritor based on molecular diffusion. The collection media is a synthetic fiber cloth(φ41mm)impregnated dilute H3PO4-glycerine solution. Ammonia in ambient air is collected to form ammonium. After exposure, the ammonium dissolved in water is analyzed by indophenol-blue spectrophotometric method. The sampling rate of NH3 is 136ml/min with standard deviation ±7.8ml/min.Compared with active device in field, the relative overall uncertainty of the passive NH3 personal monitor is ±17%. The lowest qualitative detection concentration is 5μg/m3(24hrs exposure). The passive NH3 personal monitor can be applied to personal NH3 exposure and indoor air pollution monitoring.
出处
《卫生研究》
CAS
CSCD
北大核心
1994年第S1期51-59,共9页
Journal of Hygiene Research
关键词
氨
被动式个体监测器
Ammmonia
passive personal monitor
