Simultaneous separation of organomercury species by nonaqueous capillary electrophoresis using methanol containing acetic acid and imidazole

✍ Scribed by Zhen-Lei Peng; Feng Qu; Guanquan Song; Jin-Ming Lin

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 524 KB
• Volume: 26
• Category: Article
• ISSN: 0173-0835
• DOI: 10.1002/elps.200500163

✦ Synopsis

Abstract

A simple and rapid nonaqueous capillary electrophoresis method for simultaneous separation of four kinds of mercury species, namely inorganic mercury, methylmercury, ethylmercury, and phenylmercury, is reported. The effective mobilities of organomercury in aqueous and nonaqueous electrolytes were compared. Imidazole was confirmed not only as a co–ion for the separation but also as an online complexing reagent for mercury species. The optimum conditions for separation were achieved by using methanol solvent containing 0.15 M acetic acid and 15 mM imidazole as electrolyte. The sensitive detection of mercury species was accomplished at 191 nm.