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- W137242759 abstract "The combination of high performance liquid chromatography and graphite furnace atomic absorption spectrometry (HPLC/GFAA) is a powerful tool for speciating environmentally labile metallic or metalloid elements. The sample extract is passed through the HPLC to effect speciation. The nature of the eluting solvent can be changed (with solvent programming) to obtain the species of interest. Samples of the HPLC effluent are periodically automatically injected into the GFAA, where the species are reduced to metallic or metalloid element. Care must be taken not to change the chemical compound or oxidation state during sample preparation. Thus, arsenic compounds were analyzed in extracts of air, water, and soil samples by HPLC using an 8% crosslinked quaternary ammonium type anion exchange resin (Bio-Rad Aminex A-27) column with solvent programming from water to 0.2 M ammonium carbonate. The HPLC effluent stream was sampled every 43 seconds during the 45 minute analysis time. Quantitation was performed by summation of the absorption measurements at the proper retention times for each species and comparing results to known standards. Trimethylarsine oxide, arsenite, dimethylarsinic acid, methanearsonic acid, and arsenate were eluted in sequence from this column. Air residues of 0.05 ug/m3, water residues to 0.05 mg/L, and soil residues above 0.5 ppm As were speciated." @default.
- W137242759 created "2016-06-24" @default.
- W137242759 creator A5033934488 @default.
- W137242759 date "1983-01-01" @default.
- W137242759 modified "2023-09-23" @default.
- W137242759 title "APPLICATION OF HPLC/GFAA FOR ARSENIC IN ENVIRONMENTAL SAMPLES" @default.
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- W137242759 doi "https://doi.org/10.1016/b978-0-08-029225-0.50016-3" @default.
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