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1. (WO2017032497) METHOD AND DEVICE FOR DETERMINING A SUBSTANCE CONCENTRATION OR A SUBSTANCE IN A LIQUID MEDIUM

Pub. No.:    WO/2017/032497    International Application No.:    PCT/EP2016/065900
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Thu Jul 07 01:59:59 CEST 2016
IPC: G01N 21/17
G01N 21/27
G01N 21/3577
Applicants: SWAN ANALYTISCHE INSTRUMENTE AG
Inventors: WAGNER, Heinz
Title: METHOD AND DEVICE FOR DETERMINING A SUBSTANCE CONCENTRATION OR A SUBSTANCE IN A LIQUID MEDIUM
Abstract:
The invention relates to a method and to a device for determining at least one substance concentration (c) or at least one substance in a liquid medium (3), wherein the method consists in the following: liquid medium (3) having a specified flow velocity is introduced into a vessel (1) having a known shape; electromagnetic waves having a specified wavelength or having a specified wavelength range are coupled into the liquid medium (3) contained in the vessel (1), wherein the electromagnetic waves (8) travel a distance in the liquid medium, which distance depends on a fill level (xi) of the liquid medium (3) in the vessel (1); intensities (Φi) of the electromagnetic waves after the distance has been traveled in the liquid medium (3) are measured at at least two specified times (ti) or at at least two specified fill levels (xi) of the vessel (1); and after a last intensity measurement, the at least one substance concentration (c) or the at least one substance is determined by using the measured intensities (Φi) and the at least two specified times (ti) or the at least two specified fill levels (xi).