Quantitative determination of wear metals in engine oils using LIBS: The use of paper substrates and a comparison between single- and double-pulse LIBS
- 作者：Pavel Yaroshchyk ; Richard J.S. Morrison ; Doug Body and Bruce L. Chadwick
- 关键词：Laser Induced Breakdown Spectroscopy (LIBS) ; LIBS in liquids ; Wear metals in engine oils
- 刊名：Spectrochimica Acta Part B ; Atomic Spectroscopy
- 出版年：2005
- 期刊代码：101_05848547
- 类别：ch
- 出版时间：November 2005
- 卷：60
- 期：11
- 页码：1482-1485
- 文件大小：193 K
摘要
A comparison between single- and double-pulse LIBS for the quantitative elemental analysis of used engine oils has been performed. Paper substrates have been utilised for the analysis and are shown to provide better limits of detection (LODs), no splashing and easier sample handling compared to the previously reported experiments using laminar liquid jets and static liquid surfaces. Single-pulse LIBS analysis of oil on paper substrates has had on average 2× better LODs than was obtained using flowing liquid jets, while double-pulse LIBS showed 4× improvement. Single-pulse LIBS has been found preferable for the analysis, as the use of an additional laser in double-pulse LIBS yielded only a minor improvement while adding substantially to the complexity and cost of the system.