Speciation Analysis of Mercury by Capillary Electrophoresis On-Line Coupled with Inductively Coupled Plasma Mass Spectrometry Based on a Micro Mist Nebulizer and a Removable Interface
LI Bao-hui1, YU Li-ping2, WANG Zhao-hui1, LIU Li-wen1,YAN Xiu-ping1*
1.Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, China 2.Department of Chemistry, Faculty of Science, Tianjin University, Tianjin 300072, China
Abstract：A method for mercury speciation analysis was developed by CE-ICP-MS with a Micro Mist nebulizer and a removable interface.Contamination of ICP-MS detector by the rising solution was avoided with the use of a removable interface during capillary rinsing.Baseline separation of methylmercury (MeHg) and inorganic mercury (Hg2+) was obtained by CE in a 45 cm×75 μm i.d.fused-silica capillary at 22.5 kV，while a mixture of 30 mmol-1 H3BO3+10% CH3OH (pH 8.7) acted as running electrolyte.The precisions (RSD, n=5) of migration time and peak area for the mercury species were in the ranges of 3.5%-3.8% and 2.3%-5.1%, respectively.The limits of detection (3σ) of MeHg and Hg2+ were 47 and 48 μg·L-1, respectively.
Key words：Inductively coupled plasma mass spectrometry;Hybrid techniques;Speciation analysis;Capillary electrophoresis;Mercury
李保会1，余莉萍2，王朝晖1，刘礼文1，严秀平1* . 基于低流速雾化器和可拆卸接口的毛细管电泳-电感耦合等离子体质谱联用技术应用于汞的形态分析[J]. 光谱学与光谱分析, 2005, 25(08): 1336-1338.
LI Bao-hui1, YU Li-ping2, WANG Zhao-hui1, LIU Li-wen1,YAN Xiu-ping1* . Speciation Analysis of Mercury by Capillary Electrophoresis On-Line Coupled with Inductively Coupled Plasma Mass Spectrometry Based on a Micro Mist Nebulizer and a Removable Interface . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(08): 1336-1338.
[1] NI Zhe-ming(倪哲明).Spectroscopy and Spectral Analysis(光谱学与光谱分析)，1995，15(6): 87. [2] YAN Xiu-ping, NI Zhe-ming(严秀平，倪哲明).Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2001，21(2): 129. [3] YAN Xiu-ping, NI Zhe-ming(严秀平，倪哲明).Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003，23(5): 945. [4] KANG Jian-zhen, DUAN Tai-cheng, LIU Jie，et al(康建珍，段太成，刘 杰，等).Chinese Journal of Analytical Chemistry(分析化学)，2004, 32: 262. [5] YE Mei-ying, YIN Xue-feng, FANG Zhao-lun(叶美英，殷学锋，方肇伦).Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003, 23(1): 89. [6] Yin X B, Yan X P, Jiang Y，et al.Anal.Chem., 2002, 74: 3720.
