摘要
介绍一种测定大气中单个硝酸盐和硫酸盐颗粒的方法 ,在采用复合薄膜法确定单个硝酸盐和硫酸盐颗粒的基础上 ,再利用X射线能谱仪对它们进行元素分析 ,其中 ,颗粒中所含的硝酸根离子和硫酸根离子分别由反应生成的针状结晶物和圆环状结晶物来确定 ,而对应的阳离子则由X射线能谱仪检出 ,在实验室中对12种大气中常见的硝酸盐和硫酸盐人工颗粒和实际大气颗粒物进行了观察 ,结果表明该法是可行的。
A method for the detection of individual nitrate and sulfate particles in atmosphere was proposed. It is based on the reaction of nitrate ion with nitron and of sulfate ion with barium chloride on a multiple thin film. Presence of nitrate and sulfate in individual particles can be indicated by appearance of needle crystals of C20H16N4·HNO3 and ring crystals of BaSO4 on the film, respectively. The corresponding cations in nitrate or sulfate particles was detected by energy dispersive X _ ray spectrometer. The results of laboratory experiments are repeatable. The method was satisfactorily applied to detect atmospheric particles samples and proved to be feasible.
出处
《分析测试学报》
CAS
CSCD
北大核心
2002年第1期5-7,共3页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目 (20077009)
广东省环境保护局和高等教育厅科技研究开发项目 (B2302564)
