Improvements to the analytical performance of inductively coupled plasma optical emission spectrometry by coupling a multi-mode sample introduction system to an infrared heated pre-evaporation tube†‡,Journal of Analytical Atomic Spectrometry

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Improvements to the analytical performance of inductively coupled plasma optical emission spectrometry by coupling a multi-mode sample introduction system to an infrared heated pre-evaporation tube†‡
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2018-04-26 00:00:00 , DOI: 10.1039/c8ja00051d
Tia K. Anderlini _{1,

2,

3,

4} , Diane Beauchemin _{1,

2,

3,

4}

Affiliation

A multimode sample introduction system (MSIS) was coupled to a pre-evaporation tube, which was connected to the base of the torch in inductively coupled plasma optical emission spectrometry (ICPOES). The pre-evaporation tube and bottom 7 cm (for ARCOS instrument) or 3 cm (for Agilent instrument) of the torch were surrounded by an infrared-heated ceramic rope, which was heated to 80 °C in nebulisation mode and to 100 °C or 175 °C in hydride generation and dual modes. This resulted in improved sensitivity and detection limit for many elements, especially hydride-forming ones, compared to what is achieved with pneumatic nebulisation, but in some degradation of precision. The applicability of the approach was demonstrated through the accurate determination of several elements in two standard reference materials (waste water and corn bran) with matrix matching but without internal standardization. With infrared heating and operating MSIS in hydride generation (HG) mode, more elements than expected could be accurately determined, including Be, Co, Cr, Mg, Mn, etc., whose determination had not been reported in this mode before.

中文翻译：

通过将多模式样品引入系统连接到红外加热的预蒸发管来改善电感耦合等离子体发射光谱的分析性能† ‡

将多模式样品引入系统（MSIS）耦合到预蒸发管，该管在电感耦合等离子体发射光谱（ICPOES）中连接到割炬的底座。预蒸发管和炬管底部7厘米（对于ARCOS仪器而言）或3厘米（对于安捷伦仪器而言）被红外线加热的陶瓷绳围绕，该陶瓷绳在雾化模式下加热至80°C，并加热至100°C氢化物生成和双模式时为175°C。与气动雾化相比，这提高了许多元素（尤其是形成氢化物的元素）的灵敏度和检测极限，但精度有所下降。该方法的适用性通过精确测定两种标准参比物质（废水和玉米糠）中的几种元素而得到证实，这些元素具有基质匹配性，但没有内部标准化。通过红外加热并在氢化物发生（HG）模式下运行MSIS，可以准确确定比预期更多的元素，包括Be，Co，Cr，Mg，Mn，等等，其确定以前未在此模式下报告过。

更新日期：2018-04-26

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