Determination of Arsenic in Rocks and Soils Using Photometry
G. M. KAZBULATOVA, S. V. MICHURIN
Institute of Geology, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa, Russia
Keywords: arsenic, arsine, arsenic molybdenum blue, rocks, soils, photometric method
Pages: 248-256
Abstract
Optimal parameters for determining As by the photometric method have been established. Results of arsenic determination in rocks and soils by means of photometry are presented. This method is distinguished by the low detection limit (0.1 g/t) and economic efficiency in comparison with other modern analytical methods (atomic absorption spectrometry, atomic emission spectrometry with inductively coupled plasma, and mass spectrometry with inductively coupled plasma). For rocks and soils containing organic matter, the applicability of the existing methods of acid decomposition and melting was evaluated. The results of As determination by means of photometry were compared with its certified contents in the State Standard Samples of rocks (SGKhM-1, SGKhM-3, SG-3, SZR-2, SKD-1, SGKh-1), and with the data obtained by means of mass spectrometry with inductively coupled plasma on volcanoclastic greywacke. The parameters of As determination by means of photometry were optimized. It is recommended to use the photometric method for mass determination of arsenic in rocks and soils.
DOI: 10.15372/CSD2022379
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