title: On-line preconcentration/determination of zinc from water, biological and food samples using synthesized chelating resin and flame atomic absorption spectrometry.
abstract: An on-line flow injection pre-concentration-flame atomic absorption spectrometry method was developed to determine trace zinc in water (tap, dam, and well water), biological (hair and nail), and liver samples. As a solid phase extractant, a synthesized new chelating resin, poly(2-thiozylmethacrylamide-co-divinylbenzene-co-2-acrylamido-2-methyl-1-propane sulfonic acid) was used. The resin was characterized by Fourier transform infrared spectroscopy, elemental analysis, and surface area by nitrogen sorption. A pre-concentration factor of 40-fold for a sample volume of 12.6 mL was obtained by using the time-based technique. The detection limit for the pre-concentration method was found to be 2.2 μg L(-1). The precision (as RSD,%) for 10 replicate determinations at the 0.04 μg mL(-1) Zn concentration was 1.2%. The calibration graph using the pre-concentration system for zinc was linear with a correlation coefficient of 0.998 in the concentration range from 0.005 to 0.05 μg mL(-1). The applicability and accuracy of the developed method were estimated by the analysis spiked water, biological, liver samples (83-105%), and also certified reference material TMDA-70 (fortified lake water) and SPS-WW1 Batch 111-Wastewater. The results were in agreement with the certified values.
authors.affiliation: Erciyes University, Faculty of Science, Chemistry Department, Kayseri, Turkey.
authors.forename: Sibel
authors.initials: S
authors.lastname: Yılmaz
authors.forename: Serife
authors.initials: S
authors.lastname: Tokalıoğlu
authors.forename: Serkan
authors.initials: S
authors.lastname: Sahan
authors.forename: Ahmet
authors.initials: A
authors.lastname: Ulgen
authors.forename: Ahmet
authors.initials: A
authors.lastname: Sahan
authors.forename: Cengiz
authors.initials: C
authors.lastname: Soykan
mesh_terms: D000818:Animals; D002614:Chelating Agents / Q000737:chemistry*; D017022:Flow Injection Analysis; D005504:Food Analysis; D006197:Hair / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008099:Liver / Q000737:chemistry; D009262:Nails / Q000737:chemistry; D009862:Online Systems; D012015:Reference Standards; D015203:Reproducibility of Results; D012117:Resins, Synthetic / Q000737:chemistry*; D012996:Solutions; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D060986:Water Wells / Q000737:chemistry; D015032:Zinc / Q000032:analysis*
chemical_list: D002614:Chelating Agents; D007477:Ions; D012117:Resins, Synthetic; D012996:Solutions; D014867:Water; D015032:Zinc