Nevşehir University, Art and Sciences Faculty, Chemistry Department, 50300 Nevşehir, Turkey.
Talanta. 2011 Sep 30;85(4):1974-9. doi: 10.1016/j.talanta.2011.07.013. Epub 2011 Jul 18.
A selective preconcentration method was described for the determination of inorganic thallium species by electrothermal atomic absorption spectrometry (ETAAS). Thallium(III) and thallium(I) as chloro and iodo complexes were selectively retained by a column containing 0.5 g of Chromosorb 105 resin and quantitatively eluted by 10 mL of pure acetone. The calibration graph was linear with a correlation coefficient of 0.997 at levels near the detection limit and up to at least 0.8 μg L(-1). The detection limits for the determination of total thallium and thallium(III) employing the proposed method by ETAAS were estimated as three values of the standard deviations, 0.050 μg L(-1) and 0.034 μg L(-1), respectively. Verification of the accuracy was carried out by the analysis of standard reference materials (GBW 07402 soil, NIST 2710 Montana soil, GBW 07309 and GBW 07310 stream sediments). The relative errors were found to be in the range of -7.7% to +4.8%. The relative standard deviations were generally found to be below 10%. The effect of potential interfering ions on the determination was studied. The proposed method was successfully applied to the determination of total thallium in five different brand cements, soils around two cement plants and metallic zinc samples. The speciation of thallium(I) and thallium(III) was applied to synthetic solutions.
一种选择性预浓缩方法被描述用于用电感耦合等离子体质谱法（ETAAS）测定无机铊形态。铊（III）和铊（I）作为氯和碘配合物被含有 0.5 克 Chromosorb 105 树脂的柱选择性保留，并通过 10 毫升纯丙酮定量洗脱。校准曲线在接近检测限的水平和至少 0.8 μg L(-1)处呈线性，相关系数为 0.997。通过 ETAAS 采用所提出的方法测定总铊和铊（III）的检测限估计为标准偏差的三个值，分别为 0.050 μg L(-1)和 0.034 μg L(-1)。通过分析标准参考物质（GBW 07402 土壤、NIST 2710 蒙大拿土壤、GBW 07309 和 GBW 07310 河流沉积物）验证了准确性。相对误差在-7.7%至+4.8%范围内。相对标准偏差通常低于 10%。研究了潜在干扰离子对测定的影响。该方法成功应用于五种不同品牌水泥、两个水泥厂周围土壤和金属锌样品中总铊的测定。铊（I）和铊（III）的形态应用于合成溶液。
