Modular design of a trap-and-atomizer device with a gold absorber for selenium collection after hydride generation,Journal of Analytical Atomic Spectrometry

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Modular design of a trap-and-atomizer device with a gold absorber for selenium collection after hydride generation
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2019-11-21 , DOI: 10.1039/c9ja00290a
Ignacio Machado _{1,

2,

3,

4,

5} , Dominik Vaněk _{1,

2,

3,

6,

7} , Stanislav Musil _{1,

2,

3} , Mariela Pistón _{4,

5,

8,

9,

10} , Jiří Dědina _{1,

2,

3} , Jan Kratzer _{1,

2,

3}

Affiliation

A novel design of a device serving to trap hydrides and to volatilize the analyte to be detected by atomic absorption spectrometry, a modular trap-and-atomizer device, was invented to allow a simple replacement of the inlet arm which serves as the trap. A device with a gold wire absorber was employed for selenium collection. The relevant experimental conditions (hydrogen flow rate, trapping temperature and volatilization temperature) were optimized by using ⁷⁵Se radiotracer experiments and atomic absorption spectrometry experiments. A lossless Se collection was achieved. Two arrangements of the trap were tested to maximize the signal/noise ratio. A limit of detection of 7 pg ml⁻¹ was found for the optimum arrangement. Results of analysis of certified reference materials TMRAIN-04 and SRM 1643e provided good accuracy and precision. Interference of several hydride forming elements was characterized. The modular design appears to be promising for collection of other hydride forming elements.

中文翻译：

带有金吸收剂的捕集和雾化器装置的模块化设计，用于在氢化物生成后收集硒

发明了一种新颖的装置设计，该装置用于捕获氢化物并挥发待通过原子吸收光谱法检测的分析物，一种模块化的捕集-雾化器装置，可以简单地替换用作捕集器的进口臂。使用具有金线吸收剂的装置来收集硒。通过使用⁷⁵ Se放射性示踪剂实验和原子吸收光谱实验，优化了相关的实验条件（氢气流速，捕集温度和挥发温度）。实现了无损硒收集。测试了陷阱的两种布置，以最大程度地提高信噪比。检出限为7 pg ml ^-1被发现是最佳的安排。认证参考材料TMRAIN-04和SRM 1643e的分析结果提供了良好的准确性和精密度。表征了几种氢化物形成元素的干扰。模块化设计似乎有望用于收集其他氢化物形成元素。

更新日期：2019-11-21

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