摘要
本文研究了一种用红色担体经强碱(KOH)处理作为吸附的载体,去离子水超声浸取,离子色谱法分析测定大气中甲酸和乙酸的方法。对固体吸附管的特性进行了实验室内模拟及野外研究。在采样体积为2.4m^3时,该法对大气中甲、乙酸的最低检出限分別为0.2μg/m^3和0.4μg/m^3。利用此法,测出北京冬季大气中甲、乙酸浓度分別为0.5—2.0μg/m^3和0.6—8.7μg/m^3,广州白云山春季大气中甲、乙酸浓度分別为0.2—1.0μg/m^3和<0.4—2.0μg/m^3,桂林市大气中甲、乙酸浓度分别为0.37—0.4μg/m^3和0.5—1.1μg/m^3。
The method was based on collection of formic and acetic acids in solid sorbent tubes containing Red Chro-mosorb (40/60 mesh) impregnated with potassium hydrate. The analytes were desorbed with deionized water in an ultrasonic bath and analyzed via IC analysis. This method was applied successfully to determination of formic and acetic acids in the ambient air of Beijing and some areas in Guangdong and Guangxi provinces. In the case of 2.4 m3 sample gas volume, the minimum detectable concentrations were about 0.2 μg/m3 and 0.4μg/m3 for formic and acetic acids respectively.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1990年第3期43-49,共7页
Environmental Science
