Axagarius Gmbh & Co. Kg

Macherey, Nagel Gmbh & Co. Handelsgesellschaft

Jürgen Hoffmann

Ralph Husmann

Dominik Lange

Edmund Radmacher

Christian Prokisch

Klaus Moller

Tobias Schillberg

Arne Dickschat

Klaus Möller

Test device and method for the semi-quantitative determination of chlorine dioxide in a liquid sample has at least two carrier matrices. The first carrier matrix comprises at least one amino acid, sodium thiosulphate, at least one redox indicator, buffer substances and at least one surfactant. The second carrier matrix comprises at least one inorganic iodide salt, starch and/or at least one starch derivative, sodium thiosulfate, buffer substances and at least one surfactant.

Test device and method for the semi-quantitative determination of chlorine dioxide in a liquid sample containing free chlorine

A method for treating a plurality of indicator fields for determining the pH-value of an aqueous solution is provided. Each of the indicator fields contains at least one indicator dye, which is fixed in a non-bleeding manner, in particular on a layer including cellulose or regenerated cellulose, and changes its color within a pH-turning-range. The indicator fields having buffer capacities which differ from one another. All the indicator fields are impregnated from the outside with an impregnation which influences the buffer capacities of the indicator fields in such a way that the deviations are levelled.

Method for treating indicator fields, indicator field and test device comprising such an indicator field

A device is provided for determining total chlorine in liquids, the device including an indicator carrier that is impregnated with a color indicator that contains Michler's thioketone, the indicator carrier additionally containing as a color indicator at least one azine as well as an iodide, in particular potassium iodide and/or sodium iodide.

Device for determining total chlorine in liquids

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Düren, Germany

Jürgen Hoffmann