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Automated prevalve dilution in flow-injection analysis

The automated determination of chloride in surface, ground and domestic water

Automatische Verdünnung vor dem Ventilsystem bei der Fließinjektionsanalyse

Automatische Chloridbestimmung in Oberflächen-, Grund- und Leitungswasser

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Zusammenfassung

Wasserproben mit stark schwankenden Chloridgehalten bis zu 800 mg/l wurden mit Hilfe der automatischen Verdünnungstechnik analysiert. Der Probendurchsatz betrug 92 je Stunde. Der Variationskoeffizient ist besser als 1,2%. Die Messung beruht auf der Bildung des rotgefärbten Eisenthiocyanatkomplexes.

Summary

An automated method for the determination of chloride in surface, ground and domestic water based on the concept of flow-injection analysis is described. Samples of a widely varying chloride content up to 800 mg/l are analysed by using an automated prevalve dilution technique. The sampling rate is 92 samples per hour. The method is suitable for the analysis of chloride with a coefficient of variation of better than 1.2%. The measurement is based on the redcoloured iron thiocyanate complex.

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Authors and Affiliations

  1. Department of Chemistry, University of Pretoria, 0002, Pretoria, South Africa

    Jacobus F. van Staden

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  1. Jacobus F. van Staden
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van Staden, J.F. Automated prevalve dilution in flow-injection analysis. Z. Anal. Chem. 322, 36–41 (1985). https://doi.org/10.1007/BF00493039

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  • DOI: https://doi.org/10.1007/BF00493039

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