Enhancing the efficiency of chemical vapor generation of zinc in a multimode sample introduction system

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-08-07 DOI:10.1007/s00706-024-03241-0

Alexandra Hadbavníková, Stanislav Musil, Jakub Hraníček, Eliška Nováková

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Abstract

Chemical vapor generation (CVG) of Zn was carried out in a multimode sample introduction system (MSIS) and coupled to inductively coupled plasma mass spectrometry (ICP-MS) for detection. CVG conditions were studied and 0.4% (m/v) 8-hydroxyquinoline as the reaction modifier in 0.08 mol dm^–3 H₂SO₄ and 3.0% NaBH₄ in 0.1 mol dm^–3 NaOH were found optimal, providing the limits of detection and quantification of 2.8 ng cm^–3 and 9.3 ng cm^–3, respectively. The overall CVG efficiency of 5.3 ± 0.1% was determined from comparison with solution nebulization-ICP-MS, while 5.7 ± 0.1% was determined using ⁶⁵Zn radiotracer and radiometry. The developed methodology was verified by determination of Zn in the standard reference material of fresh water (NIST 1643f). Interference study conducted with 13 hydride-forming and transition elements did not prove ability of any of the tested element to further increase the CVG efficiency, but at the same time, none of them exhibited serious interference except Ag.

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在多模式样品引入系统中提高锌的化学气相生成效率

在多模式样品导入系统（MSIS）中进行了锌的化学气相发生（CVG），并与电感耦合等离子体质谱（ICP-MS）联用进行检测。对 CVG 条件进行了研究，发现 0.4% (m/v) 8- 羟基喹啉作为反应改性剂在 0.08 mol dm-3 H2SO4 和 3.0% NaBH4 在 0.1 mol dm-3 NaOH 中的反应条件最佳，检出限和定量限分别为 2.8 ng cm-3 和 9.3 ng cm-3。通过与溶液雾化-ICP-MS 的比较，确定总体 CVG 效率为 5.3 ± 0.1%，而使用 65Zn 放射性示踪剂和辐射测量法确定的效率为 5.7 ± 0.1%。通过测定淡水标准参考材料（NIST 1643f）中的锌，验证了所开发的方法。对 13 种水化物形成元素和过渡元素进行的干扰研究并未证明任何一种测试元素能够进一步提高 CVG 效率，但同时，除 Ag 外，其他元素均未表现出严重干扰。

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Monatshefte für Chemie / Chemical Monthly

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