Abstract A simple, sensitive and economical technique is needed for the determination of thallium and this study demonstrates the different analytical strategies were developed using atomic absorption spectrometry (AAS). In order to improve the sensitivity of flame atomic absorption spectrometry (FAAS), a basic slotted quartz tube (SQT) was used for the thallium determination. In the first strategy, mixing propanol (100 μL) and Tl standard solution (500 μL) under the optimum conditions, namely solvent assisted SQT-FAAS, provided 4.49 folds enhancement in detection power with the help of better nebulization efficiency and/or atomization of analytes. Furthermore, SQT was used as an atom trap, AT as the second strategy. In this method, analyte atoms were trapped for 5.0 min on the SQT inner surface under the lean flame. In addition, a novel analytical method was developed using an inner surface coated SQT with metals with low volatility (palladium, tungsten, molybdenum, zirconium, tantalum, osmium and titanium). Under the all optimum conditions, limit of detection values were found to be 38 ng mL−1 and 3.5 ng mL−1 for SQT-AT-FAAS and Os-Coated-SQT-AT-FAAS methods, respectively. 319 folds improvement in detection power was obtained by Os-Coated-SQT-AT-FAAS method with respect to conventional FAAS.

中文翻译：

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用开缝石英管火焰原子吸收光谱法测定痕量铊的灵敏分析方法的开发

摘要 测定铊需要一种简单、灵敏且经济的技术，本研究表明使用原子吸收光谱法 (AAS) 开发了不同的分析策略。为了提高火焰原子吸收光谱法 (FAAS) 的灵敏度，使用碱性开槽石英管 (SQT) 进行铊测定。在第一种策略中，在最佳条件下混合丙醇（100 μL）和 Tl 标准溶液（500 μL），即溶剂辅助 SQT-FAAS，借助更好的雾化效率和/或雾化分析物。此外，SQT 被用作原子陷阱，AT 作为第二个策略。在该方法中，分析物原子在稀薄火焰下的 SQT 内表面被捕获 5.0 分钟。此外，开发了一种新的分析方法，使用内表面涂层 SQT 和低挥发性金属（钯、钨、钼、锆、钽、锇和钛）。在所有最佳条件下，SQT-AT-FAAS 和 Os-Coated-SQT-AT-FAAS 方法的检测限分别为 38 ng mL-1 和 3.5 ng mL-1。与传统 FAAS 相比，Os-Coated-SQT-AT-FAAS 方法的检测能力提高了 319 倍。