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1.5th-Differential polarographic determination of trace amounts of selenium(IV) and selenium(VI) in natural waters at a dropping mercury electrode

WU Dun-hu, Zhang Diyang, Li Xiaoming

Open publisher page 11 citations

Abstract

This paper describes a polarographic method for the determination of trace amounts of SeIV and SeVI in natural waters using a dropping mercury electrode. In an HClO4-Na2SO3-NH3-NH4Cl-NH2OH.HCl-KlO3 system (pH 10), the selenium complex SeSO32– gave a peak potential at –0.57 V versus Ag. The peak current was directly proportional to Se in the concentration range 0.01–1 µg l–1. The limit of detection was 10 ng l–1. The proposed method is rapid, simple, sensitive and accurate. The recovery of Se from standard additions to samples of natural waters was between 93 and 105%.

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What this paper is about

This paper describes a polarographic method for the determination of trace amounts of SeIV and SeVI in natural waters using a dropping mercury electrode. In an HClO4-Na2SO3-NH3-NH4Cl-NH2OH.HCl-KlO3 system (pH 10), the selenium complex SeSO32– gave a peak potential at –0.57 V versus Ag. The peak current was directly proportional to Se in the concentration range 0.01–1 µg l–1. The limit of detection was 10 ng l–1. The proposed method is rapid, simple, sensitive and accurate. The recovery of Se from standard additions to samples of natural waters was between 93 and 105%.

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OpenAlex reports 11 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

This paper describes a polarographic method for the determination of trace amounts of SeIV and SeVI in natural waters using a dropping mercury electrode. In an HClO4-Na2SO3-NH3-NH4Cl-NH2OH.HCl-KlO3 system (pH 10), the selenium complex SeSO32– gave a peak potential at –0.57 V versus Ag. The peak current was directly proportional to Se in the concentration range 0.01–1 µg l–1. The limit of detection was 10 ng l–1. The proposed method is rapid, simple, sensitive and accurate. The recovery of Se from standard additions to samples of natural waters was between 93 and 105%.

Key concepts: Polarography, Selenium, Mercury (programming language), Trace Amounts, Chemistry, Dropping mercury electrode, Detection limit, Electrode

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1.5th-Differential polarographic determination of trace amounts of selenium(IV) and selenium(VI) in natural waters at a dropping mercury electrode — Research Paper | ScholarLens