Open AccessPhotochemical alkylation of inorganic arsenic : Part 1. Identification of volatile arsenic species
Author(s) -
Xuming Guo,
Ralph E. Sturgeon,
Zoltán Mester,
Graeme J. Gardner
Publication year - 2005
Publication title -
journal of analytical atomic spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 113
eISSN - 1364-5544
pISSN - 0267-9477
DOI - 10.1039/b503661e
Subject(s) - chemistry , formic acid , arsenite , arsenic , acetic acid , butyric acid , alkylation , aqueous solution , inorganic chemistry , carboxylic acid , nuclear chemistry , isobutyric acid , organic chemistry , catalysis
Volatile arsenic species generated by UV irradiation of aqueous solutions of arsenite in low molecular weight (LMW) carboxylic acid media (formic, acetic, propionic and butyric) were identified using ICP-TOF-MS and GC-MS. Cryogenic trapping-GC-MS reveals that inorganic arsenite can be alkylated to yield AsH3 in the presence of formic acid, trimethylarsine in acetic acid, triethylarsine in propionic acid and tripropylarsine in butyric acid solutions. Mixed ligand arsenic species such as methylarsine, dimethylarsine, dimethylethylarsine and diethylmethylarsine are also formed when a mixture of acids is used. Using 0.05 mg l\u22121 As(III) as the test solution in 3.1 M acetic acid, a methylation efficiency of approximately 75% was achieved.Peer reviewed: NoNRC publication: Ye
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