Determination of trace mercury species by high performance liquid chromatography-inductively coupled plasma mass spectrometry after cloud point extraction.
A sensitive method for speciation analysis of inorganic mercury (Hg(2+)) and methyl mercury (MeHg(+)) has been developed by using high performance liquid chromatography (HPLC) combined with inductively coupled plasma mass spectrometry (ICP-MS) after cloud point extraction. The analytes were complexed with sodium diethyldithiocarbamate (DDTC) and preconcentrated by a non-ionic surfactant Triton X-114. Mercury species were effectively separated by HPLC in less than 6 min. The enhancement factors for 25 mL sample solution were 42 and 21, and the limits of detection were 4 and 10 ng L(-1) for Hg(2+) and MeHg(+), respectively. The developed method was successfully applied to the determination of trace amount of mercury species in environmental and biological samples.
Chen
Haiting
H
Ningbo Entry-Exit Inspection and Quarantine Bureau, Ningbo 315012, China.
Chen
Jianguo
J
Jin
Xianzhong
X
Wei
Danyi
D
D011232:Chemical Precipitation; D002851:Chromatography, High Pressure Liquid; D004784:Environmental Monitoring / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods; D008628:Mercury / Q000032:analysis*; D008767:Methylmercury Compounds / Q000032:analysis; D017830:Octoxynol; D011092:Polyethylene Glycols
D008767:Methylmercury Compounds; D011092:Polyethylene Glycols; D017830:Octoxynol; C010615:Nonidet P-40; D008628:Mercury