期刊
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 38, 期 2, 页码 325-332出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ja00343k
关键词
-
Nowadays, diatomic molecular emission is commonly used in laser-induced breakdown spectroscopy (LIBS) for multiple purposes. However, these signals are often interfered with by other spectral emissions, which can hinder accurate analysis. In this study, a methodology to eliminate interferences from CaO and Na was developed and evaluated. The use of Ar was recommended to improve Cl determination by reducing interference from Na.
Nowadays, emission from diatomic molecules is frequently used for multiple purposes within laser-induced breakdown spectroscopy (LIBS). However, these spectrally broad signals are often found to be interfered with by other spectral emissions, which can be detrimental for analytical purposes. In the particular case of chlorine determination in cements via CaCl emission (similar to 593 nm), the spectral interferences are caused by molecular CaO (similar to 590-620 nm) and atomic Na I (similar to 590 nm) emissions. In this work, a methodology to remove both CaO and Na interferences was developed and critically evaluated, overcoming the problematics associated with the absence of a Cl-blank cement sample and the variability of Na concentration in the analyzed samples. Moreover, the generation of a plasma in Ar- and He-enriched atmospheres was also investigated, concluding that the use of Ar is recommended to improve Cl determination since it yields a higher sensitivity while maintaining a lower contribution of Na interferences. The suitability of the developed protocol was demonstrated through the successful determination of Cl content in real cement samples, with concentrations ranging between 0.23 and 1.5 wt% of Cl.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据