Abstract

The use of direct reading emission spectrographs is a well known means of analyzing used crankcase oils for trace metals. The analysis can be accomplished without any sample preparation by employing a rotating graphite disc as one of the electrodes. A graphite rod is used as the counterelectrode. The disc, as it rotates, is partially immersed in the sample, and thus a fresh supply of oil is continuously presented to the discharge gap.

Trace analysis of oil-in-water by using visible LED and metal waveguide capillary

Min Bai, Hui Huang, Yan Yu, Jian Hao, Ji Zhang, Jianchao Fan, and Jun Yan
Opt. Express 24(13) 14538-14545 (2016)

Quantitative analysis of the distribution and content of trace metal elements in liquid samples with a three-dimensional confocal x-ray technique

Zhujun Xiang, Zhaoying Meng, Zhiguo Liu, Yue Han, Kai Pan, Peng Zhou, and Yude Li
Appl. Opt. 58(16) 4250-4257 (2019)

Figure of Merit for the Spectrometric Analysis of Small Samples

George S. Stanford
J. Opt. Soc. Am. 51(7) 773-775 (1961)

Fluorescence hyperspectral imaging system for analysis and visualization of oil sample composition and thickness

Qingsheng Xue, Ming Qi, Zhanfeng Li, Bai Yang, Wenhao Li, Fupeng Wang, and Qian Li
Appl. Opt. 60(27) 8349-8359 (2021)

The Use of Briquetted Samples in the Spectrochemical Analysis of Carbon and Alloy Steels and Other Metals

J. F. Woodruff
J. Opt. Soc. Am. 40(4) 192-196 (1950)