Yazar "Tuzen, M" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    Aluminium determination in environmental samples by graphite furnace atomic absorption spectrometry after solid phase extraction on Amberlite XAD-1180/pyrocatechol violet chelating resin
    (ELSEVIER SCIENCE BV, 2004) Narin, I; Tuzen, M; Soylak, M
    A chelating resin, pyrocatechol violet (PV) immobilised on an Amberlite XAD-1180 Support, was prepared and its use for the atomic absorption spectrometric determination of aluminium was investigated. The XAD-1180-PV resin was characterised by infrared spectrometry and thermal gravirnetric analysis. The optimum pH value for quantitative sorption is 8-9, and desorption can be achieved by using 5.0-10.0 nil of 2 M HCl. The effects of diverse ions on the sorption and recovery of aluminium have been studied. The capacity of sorbent was 6.45 +/- 10.59 mg g(-1) Al XAD-1180-PV. Recoveries for aluminium from water samples were in the range 95-105%. The accuracy of procedure was confirmed by aluminium determination in certified reference materials. The method developed was applied with varying results to the analysis of natural water, haemodialysis fluids and microwave digested red wine samples from Tokat City. (C) 2003 Elsevier B.V. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Application of the sequential extraction procedure for dust samples from Kayseri-Turkey
    (PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2004) Soylak, M; Uzek, U; Narin, I; Tuzen, M; Turkoglu, O; Elci, L
    Sequential extraction procedure (acid extractable, reducible, oxidizable, and residual) proposed by Standards, Measurements and Testing Programme, formerly: Community Bureau of Reference (BCR) was applied for the determination of trace metals in the house dust samples collected from Kayseri Turkey. The determination of trace metals in the samples was performed by flame atomic absorption spectrometry. The proposed method showed satisfactory recoveries, detection limits and standard deviations for trace metals determination in dust samples. Generally, most of the elements were found in the oxidizable and residual fractions. The total concentrations of trace metals analyzed were found in the range, for Cu: 62.4-119.8, Ni: 37.8-97.8, Cd: 2.54-4.27 and Cr: 38.7-53.5 mg/kg. The results are in agreement with the reported values in the literature.
  • Küçük Resim Yok
    Öğe
    Comparison of sample preparation procedures for the determination of trace heavy metals in house dust, tobacco and tea samples by atomic absorption spectrometry
    (WILEY-V C H VERLAG GMBH, 2004) Narin, I; Tuzen, M; Soylak, M
    The effect of wet ashing, dry ashing and microwave procedure for the determination of trace metal levels was investigated in house dust, tobacco and tea samples by atomic absorption spectrometry. The study of sample preparation procedures showed that the microwave method was the best. The recovery of trace metals was very good and precision and accuracy were compatible with standard reference material. The relative standard deviations for all measured metal concentrations were lower than 10%. The digestions of HNO3/H2SO4/HClO4 (4:1:1) mixture for house dust, HNO3/HSO4/H2O2 (2:2:2) mixture for tea and HNO3/H2O2 (4:2) mixture for tobacco were very efficient.
  • Küçük Resim Yok
    Öğe
    XAD-4/PAN solid phase extraction system for atomic absorption spectrometric determinations of some trace metals in environmental samples
    (TAYLOR & FRANCIS INC, 2004) Tuzen, M; Narin, I; Soylak, M; Elci, L
    A simple, fast, and sensitive column solid phase extraction study has been proposed for flame atomic absorption spectrometric determination of lead, cadmium, chromium, nickel, copper, and manganese ions on XAD-4 as 1-(2-pyridylazo)2-naphthol (PAN) complexes. The analytes were sorbed as PAN complexes on Amberlite XAD-4 column at the pH range of 8.5-10, and then eluted with 1 M HNO3 in acetone. The effect of pH, reagent amount, sample volume, and matrix of the sample on the sorption of metal ions has also been investigated. The concentration of analytes after separation and preconcentration was in agreement with the added amount of ions. The present method was found to be applicable to the preconcentration of analyte ions in river water from Yesilirmak, lake water from Lake Van, bottled mineral waters, tap water, stream sediment, mushroom, tobacco, and black tea samples with good results (recoveries greater than 95%, relative standard deviations lower than 10%).