A new procedure for the determination of Al, Ba, Ca, Fe, K, Mg, Na and Sr in snow samples by inductively coupled plasma optical emission spectrometry (ICP-OES) has been developed. The analytes were 100-fold preconcentrated by sample volume reduction and quantified by ICP-OES using the heated torch-integrated sample introduction system (hTISIS). After multivariate optimization of the hTISIS/ICP-OES operating parameters for maximum sensitivity and plasma robustness, fit-for-purpose performances were achieved, requiring only 20 mL of sample (as water equivalent). The analytical recovery was quantitative (except for Ba at low concentration, ≈80%) and the precision of the procedure was better than 5%. The limits of detection (Al: 0.10 ng g⁻¹; Ba: 0.013 ng g⁻¹; Ca: 0.52 ng g⁻¹; Fe: 0.13 ng g⁻¹; K: 0.38 ng g⁻¹; Mg: 0.04 ng g⁻¹; Na: 0.39 ng g⁻¹; Sr: 0.003 ng g⁻¹) were suitable for the analysis of Antarctic snow, with some limitation for Ba. The accuracy of the method was assessed by the analysis of the certified reference water NIST SRM 1640a. The application of the analytical method to sixty snow samples collected at Dome C, on the East Antarctic Plateau, provided self-consistent results, in good agreement with literature data.

开发了一种通过电感耦合等离子体发射光谱法 (ICP-OES) 测定雪样中的铝、钡、钙、铁、钾、镁、钠和锶的新程序。分析物通过样品体积减少 100 倍预浓缩，并使用加热炬集成样品引入系统 (hTISIS) 通过 ICP-OES 进行定量。在对 hTISIS/ICP-OES 操作参数进行多变量优化以实现最大灵敏度和等离子体稳定性后，实现了适合用途的性能，仅需要 20 mL 样品（作为水当量）。分析回收率是定量的（除了低浓度的 Ba，≈80%）并且该程序的精密度优于 5%。检测限（Al：0.10 ng g ^-1；Ba：0.013 ng g ^-1；Ca：0.52 ng g ^-1; Fe：0.13 ng g ^-1；K：0.38 ng g ^-1；Mg：0.04 ng g ^-1；Na：0.39 ng g ^-1；Sr：0.003 ng g ^-1 ) 适用于南极雪的分析，对 Ba 有一些限制。该方法的准确度通过对 NIST SRM 1640a 有证参考水的分析进行评估。将该分析方法应用于在南极东部高原 Dome C 收集的 60 个雪样，提供了自洽的结果，与文献数据非常吻合。