摘要
用ＫＣｌ涂层的扩散管（ＫＣｌｃｏａｔｄｅｎｕｄｅｒ）测定了大气中的二价汞（Ｈｇ２＋）。实验结果表明：扩散管对Ｈｇ２＋的吸附率＞９５％；对Ｈｇ０的吸附率＜５％，实验所用的扩散管对Ｈｇ２＋最大吸附量不超过３０ｎｇ，所吸附的Ｈｇ２＋可以用１ｍｏｌ·Ｌ－１ＨＣｌ定量解吸，冷原子荧光测定Ｈｇ，回收率＞９８％。选择贵州某汞矿区冶炼车间，测定的Ｈｇ２＋含量为５４～７３ｎｇ·ｍ－３，约占大气总汞浓度的１０％～１５％。
A KCl coat denuder was employed for the measurement of divalent mercury(Hg2+)in air. Gaseous Hg2+ and Hg0 were collected by the denuder with a efficiency of >95% and <5%,respectively. Maximum Hg load on one denuder should be less than 30 ng and Hg2+ trapped in the denuder can be quantitatively extracted by 1 mol·L-1 HCl and analyzed by cold atomic fluorecence spectrometry. Hg can be recovered from the denuder with a efficiency of >98%. Hg2+ contents of 54～73 ng·m-3 corresponding to about 15% of the total gaseous mercury were determined for air near a Hg _ smelting workshop.
出处
《分析测试学报》
CAS
CSCD
1999年第2期14-16,共3页
Journal of Instrumental Analysis
基金
国家自然科学基金
国家自然科学基金国际合作项目资助
