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Title (Primary) Separation of organic and inorganic arsenic species by HPLC-ICP-MS
Author Londesborough, S.; Mattusch, J.; Wennrich, R.
Journal Fresenius Journal of Analytical Chemistry
Year 1999
Department ANA
Volume 363
Page From 577
Page To 581
Language englisch

The HPLC separation of eight anionic, cationic or neutral arsenic species (arsenite, arsenate, monomethylarsonic acid, dimethylarsinic acid, arsenobetaine, arsenocholine, trimethylarsine oxide and tetramethylarsonium ion) on a high-capacity, anion-exchange column (Ion Pac AS 7, Dionex) was studied. The separation was performed during one run with a nitric acid gradient ranging from pH 4–1.3. The influence of sodium dodecyl sulfate (SDS), sodium octyl sulfate (SOS) and 1,2-benzenedisulfonic acid (BDSA) as ion pairing eluent modifiers was investigated. In addition the effect of elevated temperatures (30 to 40 °C) was studied. The best results were obtained at room temperature of 20 °C with 0.05 mM benzenedisulfonic acid as the eluent modifier. The chromatograph was connected to an ICP-MS via a cross-flow nebulizer. Detection limits obtained with the optimized chromatographic separation were 0.16–0.60 μg As L–1 for different species. The proposed speciation method was applied to the determination of arsenic species in the DORM-2 reference material (Dogfish Muscle) and in aqueous extracts of mushrooms collected on arsenic contaminated ground.

Persistent UFZ Identifier
Londesborough, S., Mattusch, J., Wennrich, R. (1999):
Separation of organic and inorganic arsenic species by HPLC-ICP-MS
Fresen. J. Anal. Chem. 363 , 577 - 581