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Development and Application of a Robust Speciation Method for Determination of Six Arsenic Compounds Present in Human Urine

By Raymer, James H.

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Book Id: WPLBN0000192918
Format Type: PDF eBook
File Size: 0.2 MB
Reproduction Date: 2005
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Title: Development and Application of a Robust Speciation Method for Determination of Six Arsenic Compounds Present in Human Urine  
Author: Raymer, James H.
Volume:
Language: English
Subject: Government publications, United Nations., United Nations. Office for Disarmament Affairs
Collections: Government Library Collection, Disarmament Documents
Historic
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Publisher: United Nations- Office for Disarmament Affairs (Unoda)

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Raymer, J. H. (n.d.). Development and Application of a Robust Speciation Method for Determination of Six Arsenic Compounds Present in Human Urine. Retrieved from http://www.worldebookfair.com/


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Government Reference Publication

Excerpt
Excerpt: Six arsenic species [arsenate, arsenite, arsenocholine, arsenobetaine, monomethyl arsonic acid, and dimethyl arsinic acid] present in human urine were determined using ion-exchange chromatography combined with inductively coupled plasma mass spectrometry (IC-ICP-MS). Baseline separation was achieved for all six species as well as for the internal standard (potassium hexahydroxy antimonate V) in a single chromatographic run of less than 30 min, using an ammonium carbonate buffer gradient (between 10 and 50 mM) at ambient temperature, in conjunction with cation- and anion-exchange columns in series. The performance of the method was evaluated with respect to linearity, precision, accuracy, and detection limits. This method was applied to determine the concentration of these six arsenic species in human urine samples (n = 251) collected from a population-based exposure assessment survey. Method precision was demonstrated by the analysis of duplicate samples that were prepared over a 2-year analysis period. Total arsenic was also determined for the urine samples using flow injection analysis coupled to ICP-MS. The summed concentration of the arsenic species was compared with the measured arsenic total to demonstrate mass balance. Key words: arsenic, HPLC, ion chromatography, plasma mass spectrometry, speciation, urine. Environ Health Perspect 111:293?296 (2003). doi:10.1289/ehp.5525 [28 October 2002].

 

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