Abstract

A brief review of photochemical vapor generation (PVG) with 86 references is first presented, with special emphasis on the methods to improve vapor generation efficiency, then the efficiency of PVG of rhenium was reported to be enhanced by Cd²⁺ and Co²⁺, which was used for sample introduction into inductively coupled plasma mass spectrometry (ICP-MS) for sensitive determination of trace Re. In the medium of 20% (v/v) formic acid, 15% (v/v) acetic acid, 30 mg L⁻¹ of Cd²⁺ and 5 mg L⁻¹ of Co²⁺, the PVG efficiency of rhenium was enhanced by 19-fold, under 90 s UV irradiation. Electron paramagnetic resonance (EPR) was utilized to investigate its possible reaction mechanism. Under the optimized experimental conditions, a limit of detection (LOD) of 1 ng L⁻¹ was obtained for rhenium. Water samples were analyzed by the proposed method, with analytical results in good agreement with those obtained by conventional pneumatic nebulization (PN) ICP-MS.

摘要

首先简要回顾了 86 篇参考文献中的光化学气相生成 (PVG)，特别强调了提高蒸汽生成效率的方法，然后报道了 Cd ²⁺和 Co ²⁺提高了铼的 PVG 效率，用于将样品引入电感耦合等离子体质谱 (ICP-MS) 以灵敏测定痕量 Re。在 20% (v/v) 甲酸、15% (v/v) 乙酸、30 mg L ^-1的 Cd ²⁺和 5 mg L ^-1的 Co ^{2+的介质中}，在 90 秒的紫外线照射下，铼的 PVG 效率提高了 19 倍。利用电子顺磁共振（EPR）研究其可能的反应机理。在优化的实验条件下，铼的检测限 (LOD) 为 1 ng L ^-1。采用该方法对水样进行了分析，其分析结果与传统气动雾化 (PN) ICP-MS 得到的分析结果非常吻合。