摘要
用被动采样方法吸收空气中的NO_2,经实验室和野外实验证明,该方法测得的NO_2浓度对渗透管发生的NO_2浓度的相关系数为0.9995.用七个相同的采样器在相同时间、相同地点测得的NO_2浓度的相对标准偏差为3.6%.当NO_2浓度为50μg/m^3左右时.采样周期可长达一个月.该方法可用于大气环境中10μg/m^3NO_2日平均浓度的测定.
The performance of a NO2 passive sampler has been tested both in laboratory and in field. The correlation coefficient obtained by plotting NO2 concentrations measured by passive method vs, those occurred by the permeation tube is found to be 0. 9995. The relative standard deviation for seven sets of passive sampler is found to be 3. 6%. The exposure time of the sampler can be lasted over period of one month at the concentration of NO2 around 50μg/ m3. The passive sampling can be used to determine the concentrations of NO2 as low as 10μg/m3 with an exposure time of one day.
出处
《环境化学》
CAS
CSCD
北大核心
1994年第5期460-465,共6页
Environmental Chemistry
关键词
被动采样
二氧化氮
分析
大气监测
passive sampling, nitrogen dioxide, ambient air , analysis.