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“Scintillation” scheme of analytical signal registration for LIBS determination of precious metals traces in geological samplesтезисы доклада
- Авторы: Labutin T.A., Popov A.M., Kiselev A.V., Zaytsev S.M., Zorov N.B.
- Сборник: 9th International Conference on Laser-Induced Breakdown Spectroscopy (LIBS 2016), Abstracts
- Тезисы
- Год издания: 2016
- Место издания: Université Claude Bernard Lyon 1 Lyon
- Первая страница: P140
- Последняя страница: P140
- Аннотация: Laser-induced breakdown spectroscopy is one of the most promising modern methods of direct rapid atomic emission analysis. Despite the many advantages of laser plasma as a source of radiation in the spectrochemical analysis, this source is short-lived and non-uniform that leads to a lack of reproducibility and sensitivity of the method for many analytical applications. These problems are hardened by the matrix effects, pulse-to-pulse variations of the analytical signal and spectral interference in the analysis of complex samples, such as geological materials. In this work, a new idea is suggested to solve the problem of sensitivity for trace and dispersed element determination like gold. In particular, the combination of "long spark", i.e. the formation of the excitation zone in the form of a line on the surface of a sample with the use of cylindrical optics and the “scintillation” scheme for signal detection was introduced to increase the sensitivity and representativeness of LIBS determination of trace elements. The “scintillation” scheme means the analytical signal as a fact of line appearance in spectra with some consideration of its intensity. This approach often use for aerosol analysis. We performed a comparison between common approaches for precious metal determination and “scintillation” scheme for quantitative analysis. The latter demonstrates some improvement of LIBS analysis in terms of LOD, which was reduced in 2-3 times for different kind of samples.
- Добавил в систему: Лабутин Тимур Александрович