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

被引：40

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

页码：797 / 802

页数：6

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