Arsenic speciation: HPLC followed by ICP-MS or INAA |
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| Authors: | W D James T Raghvan T J Gentry G Shan R H Loeppert |
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| Institution: | (1) Center for Chemical Characterization and Analysis, Department of Chemistry, Texas A&M University, College Station, TX 77843, USA;(2) Department of Soil and Crop Science, Texas A&M University, College Station, TX 77843, USA |
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| Abstract: | Sensitivities for the measurement of four arsenic species, AsIII, AsV, monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA), in environmental waters and rice extracts by a new neutron
activation analysis (NAA) method using pre-separation of the species by liquid chromatography were determined. A manual fraction
collection was used to isolate the species, followed by instrumental neutron activation analysis procedures. The sensitivities
determined for arsenic species in the samples varied from 1.21 to 1.47 ng per vial or about 30 μg·L−1 in sample solutions which translates to about 900 ng arsenic per gram of rice for our HPLC-NAA experiments. |
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