Slurry sampling thermospray flame furnace atomic absorption spectrometric determination of bismuth in water and geological samples combined with ultrasound-assisted dispersive micro solid phase extraction,Journal of Analytical Atomic Spectrometry

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Slurry sampling thermospray flame furnace atomic absorption spectrometric determination of bismuth in water and geological samples combined with ultrasound-assisted dispersive micro solid phase extraction
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020/01/14 , DOI: 10.1039/c9ja00436j
Kan Hu _{1,

2,

3,

4} , Peng Li _{1,

2,

3,

4} , Shengchun Yang _{1,

2,

3,

4} , Xiaodong Wen _{1,

2,

3,

4}

Affiliation

A new method for the determination of bismuth was established by combining ultrasound-assisted dispersive micro solid phase extraction (UA-DMSPE) with thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) for the first time in this work. Nanometer-sized titanium dioxide (nano-TiO₂) was used as the adsorbent, and the unpacked extraction pattern simplified the operation procedure. The extraction process was assisted by ultrasound. With the application of slurry sampling, the on-line method combining UA-DMSPE with TS-FF-AAS was developed. Problems of nebulization associated with previous methods based on the coupling of FAAS and solid phase microextraction (SPME) were overcome. The combination significantly improved the analytical performance of the modified FAAS instrument. Under the optimal conditions, the limit of detection (LOD) was 0.34 μg L⁻¹, with a sensitivity enhancement factor (EF) of 67. Compared with direct FAAS, the EF was as high as 736. The method was applied to analyze environmental water and geological samples with good agreement with certified values of the standard materials or with values obtained using ICP-MS, which demonstrated its reliability for the determination of traces of Bi in environmental samples. The proposed method provides a promising, simple and low-cost approach to develop a sensitive detection method for Bi based on FAAS.

中文翻译：

超声辅助分散微固相萃取-浆液进样热喷雾火焰炉原子吸收光谱法测定水和地质样品中的铋

这项工作首次将超声辅助分散微固相萃取（UA-DMSPE）与热喷雾火焰炉原子吸收光谱法（TS-FF-AAS）相结合，建立了一种测定铋的新方法。纳米级二氧化钛（nano-TiO ₂）用作吸附剂，解压萃取模式简化了操作程序。超声辅助提取过程。随着泥浆采样的应用，开发了结合UA-DMSPE和TS-FF-AAS的在线方法。克服了与先前基于FAAS和固相微萃取（SPME）耦合的方法相关的雾化问题。这种结合大大改善了改进型FAAS仪器的分析性能。在最佳条件下，检出限（LOD）为0.34μgL ^-1，灵敏度增强因子（EF）为67。与直接FAAS相比，该因子高达736。该方法用于分析环境水和地质样品，其与标准材料的认证值或获得的值具有良好的一致性。 ICP-MS，证明了其在测定环境样品中痕量Bi方面的可靠性。该方法为基于FAAS的Bi灵敏检测方法的开发提供了一种有希望的，简单且低成本的方法。

更新日期：2020-03-12

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