Haji Shabani Ali Mohammad, Dadfarnia Shayessteh, Nasirizadeh Navid
Department of Chemistry, Yazd University, Yazd, Iran.
Anal Bioanal Chem. 2004 Mar;378(5):1388-91. doi: 10.1007/s00216-003-2465-1. Epub 2004 Jan 21.
Trace amounts of inorganic mercury (Hg(2+)) and methylmercury cations (MeHg(2+)) were adsorbed quantitatively from acidic aqueous solution onto a column packed with immobilized dithizone on microcrystalline naphthalene. The trapped mercury was eluted with 10 ml of 7 mol L(-1) hydrochloric acid solution. The Hg(2+) was then directly reduced with tin (II) chloride, and volatilized mercury was determined by cold vapor atomic absorption spectrometry (CVAAS). Total mercury (Hgt) was determined after decomposition of MeHg(+) into Hg(2+). Hg(2+) and MeHg(+) cations were completely recovered from the water with a preconcentration factor of 200. The relative standard deviation obtained for eight replicate determinations at a concentration of 0.3 microg L(-1 )was 1.8%. The procedure was applied to analysis of water samples, and the accuracy was assessed via recovery experiment.
痕量无机汞（Hg(2+)）和甲基汞阳离子（MeHg(2+)）从酸性水溶液中被定量吸附到填充有微晶萘上固定化双硫腙的柱上。捕获的汞用10毫升7摩尔/升盐酸溶液洗脱。然后用氯化亚锡将Hg(2+)直接还原，挥发汞通过冷蒸气原子吸收光谱法（CVAAS）测定。在将MeHg(+)分解为Hg(2+)后测定总汞（Hgt）。Hg(2+)和MeHg(+)阳离子从水中完全回收，预富集因子为200。在浓度为0.3微克/升时进行八次重复测定得到的相对标准偏差为1.8%。该方法应用于水样分析，并通过回收率实验评估准确性。
