Permanent Sorbent-Modifiers for Electrothermal Atomic Absorption Determination of Arsenic with Photochemical Vapor Generation
Abstract
The properties of permanent sorbent-modifiers (iridium, zirconium and tungsten carbides) are investigated with regard to trapping gaseous trimethylarsine and subsequent electrothermal atomic absorption determination of arsenic. Trimethylarsine is produced by photochemical vapor generation using an original reactor. Introduction of the activated carbon upon graphite furnace treatment with tungsten appeared expedience for production of carbide nanoparticles which enhance sorption efficiency. The parameters of photochemical vapor generation of trimethylarsine and thermal conditions of its trapping and atomization are optimized. The developed analytical scheme is applied for As determination in tap water. The absolute and concentration limits of As detection (calculated by 3s-criterion) are 0.38 ng and 31 ng/liter, respectively.
About the Authors
M. Yu. Burylin
Кубанский государственный университет
Russian Federation
Russian Federation
K. A. Romanovskii
Кубанский государственный университет
Russian Federation
Russian Federation
A. V. Knyaginichev
Кубанский государственный университет
Russian Federation
Russian Federation
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For citations:
Burylin M.Yu., Romanovskii K.A., Knyaginichev A.V. Permanent Sorbent-Modifiers for Electrothermal Atomic Absorption Determination of Arsenic with Photochemical Vapor Generation. Industrial laboratory. Diagnostics of materials. 2015;81(9):12-18. (In Russ.)
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