Determination of thallium in wine by electrothermal atomic absorption spectrometry after extraction preconcentration

被引：39

作者：

Cvetkovic, J

Arpadjan, S

Karadjova, I

Stafilov, T

机构：

[1] Univ St Cyril & Methudius, Fac Sci, Inst Chem, Skopje 1000, North Macedonia

[2] Inst Agr, Skopje 1000, North Macedonia

[3] Univ Sofia, Fac Chem, BU-1126 Sofia, Bulgaria

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2002年 / 57卷 / 06期

关键词：

thallium; wine; extraction; electrothermal atomic absorption spectroscopy (ETAAS);

D O I：

10.1016/S0584-8547(02)00032-0

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A simple method for extraction electrothermal atomic absorption spectroscopy (ETAAS) determination of Tl in wine is described. The wine sample is decomposed with a mixture of nitric acid and hydrogen peroxide and both thallium species Tl(I) and Tl(I) are extracted from 0.5 mol I-1 KI solution into iso-butyl methyl ketone (IBMK). Optimal parameters for ETAAS measurement of the iodide complexes extracted were defined for two different instruments: Perkin Elmer Zeeman 3030 (HGA 600) and Varian SpectrAA-880 (GTA-100). Modifiers of tartaric acid, Pd [ammoniumtetrachloropaladate (II)] or Ag (silver nitrate) were investigated for thermal stabilization of such extremely volatile species as iodide complexes of Tl. The analytical procedure developed permits 50-fold preconcentration and determination of 0.05 mug l(-1) Tl in wine. The relative standard deviation ranges from 6 to 12% for the concentration range 0.2-1 mug l(-1) Tl in wine. (C) 2002 EIsevier Science B.V. All rights reserved.

引用

页码：1101 / 1106

页数：6

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