Study of adsorption Ag and Pb in liquid sample using Berea sandstone by commercial laser-induced breakdown spectroscopy (LIBS)

8th International Conference on Physics and its Applications

Suyanto, H.^1 ; Wendri, N.^1 ; Agustiningrum, U.^1 ; Manurung, M.^2

Physics Dept, Indonesia^1

Chemistry Dept., Mathematics and Natural Sciences Faculty, Udayana University, Jl. Kampus Bukit Jimbaran-Denpasar, Bali

80361, Indonesia^2

关键词: Adsorption method;    Experiment parameters;    Laserinduced breakdown spectroscopy (LIBS);    Limit of detection;    Optimum conditions;    Qualitative and quantitative analysis;    Sample temperature;    Standard liquids;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012107/pdf
DOI  :  10.1088/1742-6596/776/1/012107

来源: IOP

【 摘 要 】

Qualitative and quantitative analysis of Pb and Ag elements in liquid samples had been done by commercial laser-induced breakdown spectroscopy (LIBS) using adsorption method on a Berea Sandstone. The aim of this study is to identify the thickness of the Berea Sandstone for adsorbing Pb and Ag elements in liquid. The experiment was started with characterizing the Berea Sandstone that contains Si, Na, H, Li, K, Ca, O, N, Be, Ti, Al, Mg and Ba. Some of these elements have ability to adsorb Pb and Ag elements in the liquid. To prove this phenomenon, it is required to look for the experiment parameter optimum conditions such as laser energy, adsorption time and sample temperature. The experiment was conducted by dropping 2 ml standard liquid containing 1000 ppm of Pb and Ag to the Berea Sandstone surface. The result showed that the parameter optimum conditions for analyzing Pb and Ag elements in liquid sample with adsorption method were adsorption delay-time of 15 minutes, laser energy of 120 mJ and sample heating of 80 C. The next experiment was focused on the number of adsorption as a function of depth. The data showed that Pb and Ag elements in liquid sample of 2 ml, 1000 ppm were fully adsorbed by the Berea Sandstone until the depth of 0.372 mm and 10.40 mm from the surface, respectively. The data also showed that the limit of detection predicted to about 22.76 ppm.