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The separation of dimethylarsinic acid, methylarsonous acid, methylarsonic acid, arsenate and dimethylarsinous acid on the Hamilton PRP-X100 anion-exchange column

✍ Scribed by Jürgen Gailer; Sean Madden; William R. Cullen; M. Bonner Denton

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
71 KB
Volume
13
Category
Article
ISSN
0268-2605

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✦ Synopsis

In order to separate the potential arsenite metabolites methylarsonous acid and dimethylarsinous acid from arsenite, arsenate, methylarsonic acid and dimethylarsinic acid, the pHdependent retention behaviour of all six arsenic compounds was studied on a Hamilton PRP-X100 anion-exchange column with 30 mM phosphate buffers (pH 5, 6, 7, 8 and 9) containing 20% (v/v) methanol as mobile phase and employing an inductively coupled plasma atomic emission spectrometer (ICP-AES) as the arsenic-specific detector. Baseline separation of dimethylarsinic acid, methylarsonous acid, methylarsonic acid, arsenate and dimethylarsinous acid was achieved with a 30 mmol dm À3 phosphate buffer (pH 5)-methanol mixture (80:20, v/v) in 25 min. Arsenite is not baselineseparated from dimethylarsinic acid under these conditions.

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✍ Subbiah Jeyakumar; Vivekchandra Guruprasad Mishra; Mrinal Kanti Das; Vaibhavi Vi 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 375 KB

## Abstract The retention behavior of U and Th as their 2,6‐pyridine dicarboxylic acid (PDCA) complexes on a cation exchange column was investigated under low pH conditions. Based on the observed retention characteristics, an ion chromatographic method for the rapid separation of uranium and thoriu