Here, we described an analytical system based on microplasma for online separation, preconcentration, excitation and determination of Hg. Owing to the combination of solution cathode glow discharge (SCGD) microplasma which in situ converted the dissolved Hg²⁺ to volatile species efficiently and atmospheric pressure glow discharge (APGD) microplasma which excited volatile Hg species efficiently, the proposed system successfully achieved the ultrasensitive determination of Hg. After the optimization of operating parameters, the detection limit (DL) of Hg was found to be 0.25 μg L⁻¹, and the relative standard deviation (RSD) at the analyte concentration of 100 μg L⁻¹ was 0.17%. The accuracy and practicality of the developed method were demonstrated by the analysis of the GBW10029 (fish) certified reference material (CRM) and human hair samples. The results obtained were within the reference range of the certified values (850 ± 30 μg kg⁻¹), and were in good agreement with the values obtained using inductively coupled plasma-mass spectrometry (ICP-MS).

中文翻译：

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大气压辉光放电发射光谱结合溶液阴极辉光放电微等离子体超灵敏测定汞

在这里，我们描述了一种基于微等离子体的分析系统，用于在线分离、预浓缩、激发和测定汞。由于溶液阴极辉光放电 (SCGD) 微等离子体有效地将溶解的 Hg ²⁺原位转化为挥发性物质和常压辉光放电 (APGD) 微等离子体有效激发挥发性 Hg 物质，该系统成功地实现了超灵敏测定汞。优化操作参数后，Hg 的检出限 (DL) 为 0.25 μg L ^-1，分析物浓度为 100 μg L ^{-1 时}的相对标准偏差 (RSD)为 0.17%。通过对 GBW10029（鱼）有证标准物质 (CRM) 和人发样品的分析，证明了所开发方法的准确性和实用性。获得的结果在认证值的参考范围内 (850 ± 30 μg kg ^-1 )，并且与使用电感耦合等离子体质谱法 (ICP-MS) 获得的值非常吻合。