Simultaneous separation of organomercury species by nonaqueous capillary electrophoresis using methanol containing acetic acid and imidazole.
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.
Peng
Zhen-Lei
ZL
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
Qu
Feng
F
Song
Guanquan
G
Lin
Jin-Ming
JM
D019342:Acetic Acid / Q000737:chemistry*; D004573:Electrolytes; D019075:Electrophoresis, Capillary / Q000379:methods*; D007093:Imidazoles / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry*; D009941:Organomercury Compounds / Q000302:isolation & purification*; D012680:Sensitivity and Specificity
D004573:Electrolytes; D007093:Imidazoles; D009941:Organomercury Compounds; D019342:Acetic Acid; D000432:Methanol