Abstract Atomization of lead hydride in a plane-parallel volume dielectric barrier discharge (DBD) atomizer coupled to a high voltage power supply source with sinusoidal waveform (28.5 kHz) was optimized with detection by atomic absorption spectrometry. Argon was found as the best discharge gas under a flow rate of 175 mL min−1 while the DBD optimum peak-to-peak high voltage was 25 kV. The performance of the novel DBD atomizer was compared to that of a conventional externally heated quartz tube atomizer (QTA) operating at 900 °C and 100 mL min−1 Ar carrier gas flow rate. Sensitivity and limit of detection (LOD) in QTA reached 0.21 s ng−1 Pb and 0.6 ng mL−1 Pb, respectively, while they reached 0.04 s ng−1 Pb and 2.3 ng mL−1 Pb in DBD. Laser-induced fluorescence (LIF) was employed to investigate the spatial distribution of free Pb atoms as well as to quantify lead hydride atomization efficiency in both atomizers. Free Pb atoms were present only in a central region of DBD atomizer. Atomization efficiency of lead hydride was quantified by LIF to be 23 ± 7%. On the contrary, free Pb atoms were distributed homogeneously along the whole optical arm in the QTA with atomization efficiency reaching 88 ± 18%.

中文翻译：

---

介质阻挡放电雾化器中氢化铅的雾化：针对原子吸收光谱法进行优化并通过激光诱导荧光研究

摘要 在平面平行体积介质阻挡放电 (DBD) 雾化器中，氢化铅的雾化与正弦波形 (28.5 kHz) 的高压电源耦合，并通过原子吸收光谱法检测进行了优化。在 175 mL min-1 的流速下，氩气被认为是最佳放电气体，而 DBD 最佳峰峰值高压为 25 kV。将新型 DBD 雾化器的性能与在 900 °C 和 100 mL min-1 Ar 载气流速下运行的传统外部加热石英管雾化器 (QTA) 的性能进行了比较。QTA 中的灵敏度和检测限 (LOD) 分别达到 0.21 s ng-1 Pb 和 0.6 ng mL-1 Pb，而 DBD 中它们分别达到 0.04 s ng-1 Pb 和 2.3 ng mL-1 Pb。采用激光诱导荧光 (LIF) 来研究游离 Pb 原子的空间分布以及量化两种雾化器中的氢化铅原子化效率。游离 Pb 原子仅存在于 DBD 雾化器的中心区域。氢化铅的雾化效率由 LIF 量化为 23 ± 7%。相反，游离 Pb 原子沿 QTA 中的整个光臂均匀分布，雾化效率达到 88±18%。