High-Sensitivity Determination of Hydrocarbon Impurities in Arsine by Reaction Gas Chromatography |
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| Authors: | V. A. Krylov O. Yu. Chernova Yu. M. Salganskii L. S. Malygina A. P. Kotkov |
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| Affiliation: | (1) Chemistry Department, N.I. Lobachevskii Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia;(2) Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, ul. Tropinina 49, Nizhni Novgorod, 603950, Russia |
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| Abstract: | It is shown that the results of determining methane in high-purity arsine by reaction gas chromatography can be overestimated by more than two orders of magnitude. This overestimation is caused by the formation of methane as a side product of the reaction. Cryogenic preconcentration at the injection stage is proposed to improve the accuracy of determination of methane, and the cryofocusing of impurity hydrocarbons is proposed to improve separation. Detection limits of (3–10) × 10–6 vol % are achieved for C1–C5 hydrocarbons. |
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