Development of a method for the sampling and analysis of sulfur dioxide and nitrogen dioxide from ambient air
Development of a method for the sampling and analysis of sulfur dioxide and nitrogen dioxide from ambient air
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环境空气中二氧化硫和二氧化氮的采样和分析方法的开发
DOI：
10.1021/ac00203a006
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发表时间：
1990
影响因子：
7.4
通讯作者：
E. D. Estes
中科院分区：
文献类型：
--
作者：
J. Sickles;P. Grohse;L. Hodson;Cynthia Salmons;Kelly Cox;A. R. Turner;E. D. Estes
本文提出了一种同时测定大气中SO{sub 2}和NO{sub 2}的方法。在三乙醇胺浸渍的玻璃纤维过滤器上收集二氧化硫和NO{sub 2}。采样后，提取过滤器，并使用离子色谱法分析提取物中的硫酸盐、亚硝酸盐和硝酸盐。根据回收的氮和硫以及采样的空气体积计算环境浓度。进行了实验室试验，以评价该方法在各种物质浓度和负载、采样率、湿度、温度、冲洗条件和干扰下的性能。描述了这些测试的结果。与其他已建立的方法相比，使用开发的方法进行现场测量。根据现场空白的精密度，估计24小时样品的SO{sub 2}和NO{sub 2}检测限为0.3和0.2 ppb，7天样品的检测限为0.04和0.03 ppb。发现精度估计值优于{±}15%，观察到精度在{±}10%以内。
A method has been developed to permit the simultaneous sampling of SO{sub 2} and NO{sub 2} from ambient air. Sulfur dioxide and NO{sub 2} are collected on triethanolamine-impregnated glass fiber filters. After sampling, the filters are extracted, and the extract is analyzed for sulfate, nitrite, and nitrate using ion chromatography. Ambient concentrations are computed from the recovered nitrogen and sulfur and the sampled air volume. Laboratory tests were conducted to evaluate the performance of the method under various species concentrations and loadings, sampling rates, humidities, temperatures, flushing conditions, and interferences. Results of these tests are described. Field measurements using the developed method compared favorably with other established methods. On the basis of the precision of field blanks, SO{sub 2} and NO{sub 2} detection limits of 0.3 and 0.2 ppb for 24-h samples and 0.04 and 0.03 ppb for 7-day samples were estimated. Precision estimates of better than {plus minus}15% were found, and accuracy within {plus minus}10% was observed.