Rapid speciation analysis of mercury by short column capillary electrophoresis on-line coupled with inductively coupled plasma mass spectrometry

2011 ◽  
Vol 3 (1) ◽  
pp. 116-121 ◽  
Author(s):  
Bao-Hui Li
Keyword(s):  
Mass Spectrometry ◽  
Capillary Electrophoresis ◽  
Inductively Coupled Plasma ◽  
Speciation Analysis ◽  
Short Column ◽  
Inductively Coupled ◽  
Rapid Speciation ◽  
Plasma Mass Spectrometry ◽  
On Line

High Throughput Speciation Analysis of Mercury in Water Environment by Short Column Capillary Electrophoresis On-Line Coupled with Inductively Coupled Plasma Mass Spectrometry

2011 ◽  
Vol 383-390 ◽  
pp. 790-795
Author(s):  
Bao Hui Li ◽  
Bao Juan Tian
Keyword(s):  
Mass Spectrometry ◽  
Capillary Electrophoresis ◽  
High Throughput ◽  
Inductively Coupled Plasma ◽  
Speciation Analysis ◽  
Fused Silica ◽  
Short Column ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

A method for mercury high throughput rapid speciation analysis was built by short column capillary electrophoresis (SC-CE) coupled with inductively coupled plasma mass spectrometry (ICP-MS). A micromist nebulizer was employed to increase the nebulization efficiency and a laboratory-made removable SC-CE-ICP-MS interface on the basis of cross design was applied to alleviate buffer contamination of ICP-MS. In less than 60 s methylmercury (MeHg(I)) and inorganic mercury (Hg(II)) were separated in a 16 × 75 μm i.d. short column fused-silica capillary at 21 kV, while a mixture of 30 mmol/L boric aicd + 5% (v/v) CH3OH (pH=8.60) acted as running electrolyte. The precisions (RSD, n=5) of migration time and peak area for MeHg(I) and Hg(II) were in the range of 1.4-2.6% and 3.3-3.4%, respectively. The limits of detection (3σ) mercury species were 9.7 and 12.0 μg/L, respectively. The recoveries for Hg(II) MeHg(I) were in the range of 96-107% and 99-105%.

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