Method and device for the determination of film forming amines in a liquid

US11474045B2 · kind B2 · utility

Assignee

• FRAMATOME · FR

Inventors

• Ute Ramminger · Roth, DE
• Ulrich Nickel · Erlangen, DE
• Jörg Fandrich · Herzogenaurach, DE

Key dates

• Filing date: Apr 3, 2018
• Grant date: Oct 18, 2022
• Expiry date: Aug 22, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/173845
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A photometric method for determination of a concentration of a film forming amine in a liquid, including providing a buffer solution of a weak acid having a pKa≥4.5 and a strong acid having a pKa≤1; diluting an aliquot of the buffer solution with water, and determining the pH of the diluted buffer solution; adding reagent to the diluted buffer solution and measuring an initial absorbance of the diluted buffer/reagent solution; preparing a sample solution by adding liquid containing the film forming amine to an aliquot of the buffer solution and measuring the pH of the sample solution; adjusting the pH of the sample solution to match the pH of the diluted buffer solution by adding strong acid; and adding the reagent to the pH adjusted sample solution to form a colored complex, and measuring the absorbance of the resulting solution in a photometer.