Hach Lange Gmbh

Hach Lance Gmbh

Helga Guthmann

Carsten Schulz

Markus Lenhard

Clemens Hanschke

Johannes Berssen

Gabriel Rueeck

Dietmar Zangenberg

Thomas Coeper

Ralf Kloos

Michael Ziedrich

Isabel Hünig

Florens Engel

Gabriel RÜECK

Thomas Coerper

The present invention provides a method of determining chemical oxygen demand (COD) for a sample with a high concentration of chloride. The method includes obtaining the sample, determining a concentration of chloride in the sample to obtain a known concentration of chloride in the sample, dosing an amount of the sample, an acid and an oxidizing agent into a container to obtain an analyte, heating the container containing the analyte, photometrically determining a preliminary chemical oxygen demand (COD) of the analyte in an analytic device, and correcting for the high concentration of chloride using a chloride correction to obtain the chemical oxygen demand (COD).

Method of determining chemical oxygen demand (COD) for high chloride samples

A liquid analysis system for a photometric determination of an analyte in a liquid sample includes an analyzer comprising a photometer, an RFID parameter reading device and an identifier reading device, and a cuvette package comprising an RFID parameter transponder and a plurality of test cuvettes of one batch. Each test cuvette comprises a reagent. Batch identification and batch-specific reagent data are stored in the RFID parameter transponder. Each test cuvette comprises a batch-specific identifier including a batch identification. The batch identification is configured to be read by the identifier reading device.

Method of using cuvette package with RFID parameter transponder and cuvettes with 2D bar code, including photometry

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Grevenbroich, Germany

Helga Guthmann