Argon fluoride LA-LEAF for rapid arsenic quantitation,Journal of Analytical Atomic Spectrometry

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Argon fluoride LA-LEAF for rapid arsenic quantitation
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2017-04-05 00:00:00 , DOI: 10.1039/c7ja00092h
J. A. Merten _{1,

2,

3,

4} , C. A. Jones _{1,

2,

3,

4} , P. D. Tribbett _{1,

2,

3,

4}

Affiliation

Coupling laser-induced fluorescence to laser ablation can reduce detection limits relative to LIBS. The wing of the broadband ∼193.3 nm emission from unmodified argon fluoride lasers can excite arsenic fluorescence via its 193.76 nm ground state transition for a simple fluorescence scheme. We present argon fluoride-excited laser-ablation laser-excited atomic fluorescence (LA-LEAF) measurements in steel and copper under argon and helium atmospheres. Because the ArF laser saturates the absorption transition and the steel samples show substantial nonspecific iron fluorescence, it is necessary to optimize the laser energy in addition to interpulse delay. LODs are slightly lower under helium (1.0 ppm in steel, 0.15 ppm in copper). These detection limits represent a modest improvement over previous LODs with LIBS, but suggest potential for improvement with line narrowing of the ArF laser.

中文翻译：

氟化氩LA-LEAF用于快速定量砷

激光诱导的荧光与激光烧蚀的耦合可以降低相对于LIBS的检测极限。未经修饰的氟化氩激光器发出的约193.3 nm宽带辐射的机翼可通过以下方式激发砷荧光其193.76 nm基态跃迁适用于简单的荧光方案。我们目前在氩气和氦气气氛下在钢和铜中进行氟化氩激发的激光烧蚀激光激发的原子荧光（LA-LEAF）测量。由于ArF激光使吸收跃迁饱和，并且钢样品显示出大量的非特异性铁荧光，因此除了脉冲间延迟外，还必须优化激光能量。在氦气下，LOD略低（钢中为1.0 ppm，铜中为0.15 ppm）。这些检测限代表了相对于先前使用LIBS的LOD的适度改进，但暗示了随着ArF激光线变窄而有改进的潜力。

更新日期：2017-04-05

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