title: Slurry analysis after lead collection on a sorbent and its determination by electrothermal atomic absorption spectrometry.
abstract: In this study, in order to eliminate the drawbacks of elution step and to reach higher enrichment factors, a novel preconcentration/separation technique for the slurry analysis of sorbent loaded with lead prior to its determination by electrothermal atomic absorption spectrometry was described. For this purpose, at first, lead was collected on ethylene glycol dimethacrylate methacrylic acid copolymer (EGDMA-MA) treated with ammonium pyrolidine dithiocarbamate (APDC) by conventional batch technique. After separation of liquid phase, slurry of the sorbent was prepared and directly pipetted into graphite furnace of atomic absorption spectrophotometer. Optimum conditions for quantitative sorption and preparation of the slurry were investigated. A 100-fold enrichment factor could be easily reached. The analyte element in certified sea-water and Bovine-liver samples was determined in the range of 95% confidence level. The proposed technique was fast and simple and the risks of contamination and analyte loss were low. Detection limit (3delta) for Pb was 1.67 microg l(-1).
authors.affiliation: Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, 34469 Maslak-Istanbul, Turkey.
authors.forename: Asli
authors.initials: A
authors.lastname: Baysal
authors.forename: Nilgun
authors.initials: N
authors.lastname: Tokman
authors.forename: Suleyman
authors.initials: S
authors.lastname: Akman
authors.forename: Cemal
authors.initials: C
authors.lastname: Ozeroglu
mesh_terms: D000327:Adsorption; D000818:Animals; D002417:Cattle; D002614:Chelating Agents / Q000737:chemistry*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000032:analysis / Q000737:chemistry*; D008099:Liver / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry*; D011109:Polymethacrylic Acids / Q000737:chemistry*; D011759:Pyrrolidines / Q000737:chemistry*; D012623:Seawater / Q000032:analysis; D013054:Spectrophotometry, Atomic; D013859:Thiocarbamates / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011759:Pyrrolidines; D013859:Thiocarbamates; D014874:Water Pollutants, Chemical; C020972:pyrrolidine dithiocarbamic acid; D007854:Lead; C004919:ethylene dimethacrylate