New Strategy Based on Dielectric Barrier Discharge Under Atmospheric Pressure to Inhibit Elemental Fractionation Effect in LA-ICP-MS
New Strategy Based on Dielectric Barrier Discharge Under Atmospheric Pressure to Inhibit Elemental Fractionation Effect in LA-ICP-MS
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基于大气压下介质阻挡放电抑制 LA-ICP-MS 中元素分馏效应的新策略
DOI：
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发表时间：
2008
影响因子：
1
通讯作者：
Hu, Ming-Yue
中科院分区：
文献类型：
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作者：
Guo, Wei;Hu, Sheng-Hong;Hu, Zhao-Chu;Zhang, Lu-Yuan;Liu, Yong-Sheug;Hu, Ming-Yue
提出了一种基于自制介质阻挡放电（DBD）装置抑制元素分馏效应的新策略。将DBD装置连接在激光烧蚀池和ICP炬之间，使激光烧蚀产生的气溶胶在DBD中预电离，减小气溶胶的粒径。结果表明，元素分馏效应在DBD中的时间-浓度比在DBD中的时间-浓度比在DBD中的时间-浓度比在DBD中的时间-浓度小。在ArF准分子193 nm LA-ICP-MS中，信号强度的平均精度（RSD，n=3）DBD模式和正常模式分别为1.46%和4.01%，213 nm LA-ICP-1000的平均精密度和信号强度在有无DBD装置的情况下均无显著变化。在193 nm激光烧蚀系统中，采用DBD装置后，元素分馏指数没有明显变化，而在213 nm LA-ICP-MS系统中，采用DBD装置后，元素分馏指数更接近于1，说明DBD装置有效地抑制了元素分馏效应。
A new strategy based on a house-made dielectric barrier discharge(DBD) device to inhibit elemental fractionation effect was developed.The DBD device was connected in between laser ablation cell and ICP torch.The aerosols induced by laser ablation were preionized in the DBD and the particle sizes of aerosol were decreased.The results indicate that elemental time-resolved signals are less fluctuant in DBD mode than normal mode during the laser ablation processes.In the ArF excimer 193 nm LA-ICP-MS,the average precision of signal intensities(RSD,n=3) with DBD mode and normal mode was 1.46% and 4.01%,respectively,and the signal intensities were reduced within 15%.While the average precision and signal intensities were found no significant change in presence and in absence of the DBD device for the 213 nm LA-ICP-MS.No obvious change was obtained for the elemental fractionation index in the 193 nm laser ablation system with the DBD device.The elemental fractionation index was closer to 1 with the DBD for 213 nm LA-ICP-MS.The results demonstrate the elemental fractionation effect was inhibited availably with the DBD device.