Determination of the deuterium/hydrogen ratio in gas reaction products by laser-induced breakdown spectroscopy

被引：39
|
作者：
D'Ulivo, A. [1 ]
Onor, M. [1 ]
Pitzalis, E. [1 ]
Spiniello, R. [1 ]
Lampugnani, L. [1 ]
Cristoforetti, G. [1 ]
Legnaioli, S. [1 ]
Palleschi, V. [1 ]
Salvetti, A. [1 ]
Tognoni, E. [1 ]
机构：
[1] CNR, Res Area, Inst Chem Phys Proc, I-56124 Pisa, Italy
来源：
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2006年 / 61卷 / 07期
关键词：
hydrogen; deuterium; boron hydrides; spectroscopy; laser; LIBS;
D O I：
10.1016/j.sab.2006.06.001
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
This paper reports the first application of laser-induced breakdown spectroscopy technique (LIBS) to the determination of deuterium/hydrogen numeric ratio (beta) in the headspace gases, essentially HD+H-2, that are generated by the hydrolysis of NaBD4-NaBH4 mixtures (molar fraction of NaBD4, x=50-100%) in acidic H2O media (O < pH < 1). The LIBS measurement of beta can be easily achieved with a coefficient of variation better than 5% (over four replicates). The value of beta allowed the calculation of the molar fraction of NaBD4, x(LIBS), with a coefficient of variation better than 2.5%. The comparison of x vs. x (LIBS) gives results that are in good agreement, within an average deviation of 3%, for x in the range of 50-100%. The best performances are obtained for beta close to unit, which makes LIBS perfectly suited for the detection of H-D exchange taking place during aqueous hydrolysis of NaBD4 or NaBH4. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：797 / 802
页数：6
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