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Determination of urinary arsenic species using an on-line nano-TiO2 photooxidation device coupled with microbore LC and hydride generation-ICP-MS system by Y.C. Sun; Y.J. Chen; Y.N. Tsai is a Chemistry article available to read on EtoBox.
What is Determination of urinary arsenic species using an on-line nano-TiO2 photooxidation device coupled with microbore LC and hydride generation-ICP-MS system about?
We have developed an on-line digestion device-based on the nano-TiO 2 -catalyzed photooxidation of arsenic species-for coupling between microbore anion-exchange chromatography (μ-LC) and hydride generation (HG)-inductively coupled plasma mass spectrometry (ICP-MS) systems that can be used for the determination of urinary arsenic species. To maximize the signal intensities of the desired arsenic species, we optimized the photocatalytic oxidation efficiency of the analyte species and developed a rapid on-line pre-reduction process for converting the oxidized species into As(III) prior to HG-ICP-MS determination. Under the optimized conditions for the nano-TiO 2 -catalyzed photooxidation-i.e., using 1 g of nano-TiO 2 per-liter, at pH 5.2, and illuminating for 3 min-As(III), monomethylarsenoic acid (MMA), and dimethylarseinic acid (DMA) can be converted quantitatively into As(V). To attain maximal hydride generation efficiency, 0.5% Na 2 S 2 O 4 solution, which can reduce As (V) to As(III) virtually instantaneously upon on-line mixing, was added as a pre-reductant prior to performing the HG step. In light of all the HG efficiency of tested arsenicals were improved and a segmented-flow
Who reads Determination of urinary arsenic species using an on-line nano-TiO2 photooxidation device coupled with microbore LC and hydride generation-ICP-MS system?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Y.C. Sun; Y.J. Chen; Y.N. Tsai
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0026-265X)
- Published
- 2007
- Language
- EN
- Field
- Chemistry (Physical Sciences)