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Extractive Freezing-Out with Centrifugation—A New Technology of Sample Preparation in Chemical Analysis on an Example of Organic Bases

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Abstract

The effect of pH on the extraction efficiency of organic bases and lindane from aqueous solutions by extractive freezing-out into acetonitrile under centrifugation conditions is studied. The technological capabilities and advantages of this method of sample preparation to the determination of organic substances in aqueous media are demonstrated. In combination with gas chromatography, single-step extractive freezing-out in the sample centrifugation mode ensures the minimum limits of detection in 10 mL of drinking water, mg/L: 0.1 for aniline, 0.05 for diphenylamine, 0.015 for caffeine, and 0.001 for lindane. The developed extraction technology is simple and performed in one step. The duration of sample preparation does not exceed 30 min; the consumption of the extractant is less than 1 mL.

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ACKNOWLEDGMENTS

Part of research was carried out using the scientific equipment of the Center for Collective Use “Ecological and Analytical Center” of the Kuban State University.

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Authors and Affiliations

  1. Faculty of Environmental Engineering, Sochi State University, 354000, Sochi, Russia

    V. N. Bekhterev

  2. Research Center of Balneology and Rehabilitation, Branch of the North Caucasian Federal Scientific and Clinical Center of the Federal Medical and Biological Agency, 354000, Sochi, Russia

    V. N. Bekhterev

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  1. V. N. Bekhterev
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Correspondence to V. N. Bekhterev.

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Translated by V. Kudrinskaya

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Bekhterev, V.N. Extractive Freezing-Out with Centrifugation—A New Technology of Sample Preparation in Chemical Analysis on an Example of Organic Bases. J Anal Chem 76, 1106–1110 (2021). https://doi.org/10.1134/S1061934821090021

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  • DOI: https://doi.org/10.1134/S1061934821090021

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