Hydrogen analysis in metal samples by selective detection method utilizing TEA CO2 laser-induced He gas plasma
Hydrogen analysis in metal samples by selective detection method utilizing TEA CO2 laser-induced He gas plasma
复制标题
利用 TEA CO2 激光诱导氦气等离子体选择性检测方法分析金属样品中的氢
DOI：
10.1007/s00339-010-5897-4
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
K. Kagawa
中科院分区：
文献类型：
--
作者：
Z. S. Lie;A. Khumaeni;T. Maruyama;Ken;H. Niki;K. Kagawa
当横向激励大气(TEA)CO_2激光器(能量1.5áJ，脉冲宽度200áns)聚焦在氦气中含有氢(H)的金属样品表面时，产生强烈的氦气等离子体，样品中只有H原子出来。氢原子随后进入氦气体等离子体，通过超稳定的氦原子被激发。利用这一技术，用含H(100-600áppm)的Zircalloy-2样品制作了良好的零截距线性校准曲线，其中补偿方法是用Oáiá777.1ánm的发射强度来减去来自不需要的H2O的H发射强度。值得强调的是，由于该技术的选择性检测，有可能实现对H的高灵敏分析，检测下限小于1ppm。
When a Transversely Excited Atmospheric (TEA) CO2laser (energy of 1.5áJ, pulse duration of 200áns) was focused on a metal sample surface containing hydrogen (H) in He gas at 1áatm, a strong helium gas plasma was produced and only H atoms came out of the sample. The H atoms then moved into the helium gas plasma to be excited through meta-stable helium atoms. Using this technique, an excellent linear calibration curve with zero intercept was made using zircalloy-2 samples containing H (100–600áppm), where the compensation method was made using an emission intensity of OáIá777.1ánm in order to subtract the H emission intensity coming from unwanted H2O. It should be emphasized that this technique has a possibility to realize highly sensitive analysis of H with a detection limit of less than 1áppm because of its selective detection.