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Determination of arsenic compounds in water samples by liquid chromatography-inductively coupled plasma mass spectrometry with an in situ nebulizer-hydride generator

✍ Scribed by Chorng-jev Hwang; Shiuh-Jen Jiang

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
725 KB
Volume
289
Category
Article
ISSN
0003-2670

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✦ Synopsis

A preliminary study of an in situ nebulizer-hydride generator as a sample introduction device for an inductively coupled plasma mass spectrometry (ICP-MS) system is described. The samples were ionic arsenic compounds that had undergone chromatographic separation before injection into the hydride generator. L-Qsteine was used instead of potassium iodide as the prereductant. Only mild treatment with nitric acid was necessary to obtain a satisfactory hydride efficiency. The sensitivity, detection limits and reproducibility of a liquid chromatographic (LC)-ICP-MS system with a hydride generator were comparable to or better than an LC-ICP-MS system with conventional pneumatic nebulization or other sample introduction techniques. The limits of detection for various arsenic species were in the range 11-51 ng 1-l. The concentrations of various arsenic species in several natural water samples were determined.

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