Method for calibrating and/or adjusting an analytical device for chemical substances in liquids, especially in aqueous solutions

US9091639B2 · kind B2 · utility

Assignee

• Endress+Hauser Conducta Gesellschaft fuer Mess- und Regeltechnik mbH + Co. KG · DE

Inventors

• Andrea Gross · Mühlacker, DE
• Ulrich Kathe · Leonberg, DE
• Thomas Schipolowski · Stuttgart, DE
• Ralf Steuerwald · Eberdingen, DE

Key dates

• Filing date: Sep 12, 2012
• Grant date: Jul 28, 2015
• Expiry date: Sep 12, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method for calibrating and/or adjusting an analytical device for chemical substances. A predetermined concentration of a chemical substance in a reference liquid is measured by mixing the reference liquid with a reagent for producing a color change, followed by irradiating with light of a predetermined wavelength. Based on the absorption of the light by the reference liquid, a concentration is determined, which is compared with the predetermined concentration of the reference liquid. In the case of which a calibrating and/or adjusting associated with the measurement process is possible without long interruptions of the measurement process, the predetermined concentration of the reference liquid is gained by mixing at least two standard, which contain different concentrations of the chemical substance.