Croatica Chemica Acta, Vol. 87 No. 1, 2014.
Izvorni znanstveni članak
https://doi.org/10.5562/cca2259
Chemical Vapour Generation for Tin Determination in High-content Calcium Matrix by Inductively Coupled Plasma Atomic Emission Spectrometry
Sanda Rončević
; Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000, Zagreb, Croatia
Ivan Nemet
; Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000, Zagreb, Croatia
Lovorka Pitarević Svedružić
; Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000, Zagreb, Croatia
Davorin Medaković
; Center for Marine Research, Ruđer Bošković Institute, G. Paliage 5, HR-52210, Rovinj, Croatia
Sažetak
Chemical vapour generation by reduction with sodium tetraborohydride and coupled to induc¬¬tively coupled plasma spectrometry (HG-ICP-AES) was examined for tin analysis in high-content calcium matrix samples. Comparison of calibration curves in aqueous and matrix-matched solution showed good linearity (R2 = 0.9951 – 0.9999) in the observed range of concentration. The effects of added calcium were established as attenuation of emission intensity for 3 % at 224.605 nm and 235.484 nm and only 1 % at 283.999 nm and 189.991 nm of tin lines. The best limit of detection, i.e. 1.9 mg L–1 in aqueous and 2.1 mg L–1 in matrix-matched solution were obtained at 189.991 nm. Method of standard addition was applied for the analysis of laboratory samples of high purity calcite and aragonite shell structures and it gave 0.11 µg g–1 and 0.17 µg g–1 of tin, respectively. The accuracy of method was tested by certified reference material (NRCC, MESS-3) and good recoveries (100.08 %) were obtained in both calibration modes. Tin content was determined by HG-ICP-AES method using matrix-matched calibration in shell samples of Mytilus galloprovinciallis. The obtained values of tin content showed relatively flat distribution in shells along the coast (0.511 – 0.718 µg g–1). Higher concentrations were measured on several hotspots, especially fishing ports and harbours. (doi: 10.5562/cca2259)
Ključne riječi
calcium matrix; hydride generation; ICP-AES; tin; shell analysis
Hrčak ID:
122275
URI
Datum izdavanja:
30.4.2014.
Posjeta: 1.980 *