摘要
应用环形扩散管同时采集和分离空气中气态组分和气溶胶颗粒两种状态的污染物，解决了采集过程中气体和颗粒物相互干扰问题。并建立了相应的离子色谱分析方法。ＳＯ２ 、ＨＮＯ２被涂在环形扩散管内壁上的１％ 碳酸钠－ １％ 甘油涂渍液所吸收，对气体污染物的吸收效率大于９５％ ，颗粒物则通过环形扩散管收集到后面的滤膜上，壁损失和滤膜采集效率分别为５％ 和１００％ 。不同状态空气污染物的分析下限为１．０×１０－ ４ｍ ｇ／ｍ ３，分析结果的平均相对误差小于６．５％ 。
An annular denuder system(ADS), which consisted of denuder tubes striping the reactive gases from air and leaving the particles on the filters was designed. After sampling, the absorbed gases and particles were separately leached with water and determined by ion chromatography. The detection limit of samples was about 1 0×10 -4 mg/m 3 for SO 2,HNO 2,SO 4 2- and NO 3 -.The loss of particles on the denuder faces was less than 5% and the collection effectiveness of particles was 100%. Absorbtion effectiveness for gases was more than 95%.The average RSD was less than 6 5%.
出处
《卫生研究》
CAS
CSCD
北大核心
1999年第6期341-342,共2页
Journal of Hygiene Research
基金
国家自然科学基金
