Catalytic-kinetic absorptiostat technique with the indigo carmine—hydrogen peroxide reaction as the indicator reaction |
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Authors: | Herbert Weisz Siegbert Pantel Gottfried Marquardt |
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Institution: | Institut für Analytische Chemie, Chemisches Laboratorium der Universität, D-7800 Freiburg i.Br. Federal Republic of Germany |
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Abstract: | The absorptiostat method previously described is used for the catalytic-kinetic determination of sulphur compounds (sulphide, thioacetamide. thiourea and thiosulphate) in the micromolar range by means of their catalytic action for the indigo carmine—hydrogen peroxide indicator reaction. The thiosulphate catalyst is activated by iron(III) or aluminium(III); aluminium(III) is deactivated by fluoride. On this basis, iron(III) is determined in the ng range, and aluminium(III) and fluoride in the μg range. |
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