An automatic titrator based on a multicommutated unsegmented flow system - Its application to acid-base titrations

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Almeida, CMNV (Author) Other; Lapa, RAS (Author) FFUP; Lima, JLFC (Author) FFUP; Zagatto, EAG (Author) Other; Araujo, MCU (Author) Other

Journal

Title: Analytica Chimica Acta

Vol. 407

Pages: 213-223

ISSN: 0003-2670

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 17 Citations

Other information

Authenticus ID: P-001-0SJ

DOI: 10.1016/s0003-2670(99)00826-0

Abstract (EN): A continuous flow methodology to perform acid-base titrations is described. The titrations are carried out on a multicommutated flow system which simulates batch titration procedures. The titration strategy is based on sequential insertion of increasing titrant and decreasing titrand volumes in a reactor, thus accomplishing complete titration curves. The assessment of the titration end point is similar to that of conventional batch procedures. The theoretical model for the determination of titrand concentration without requiring any calibration process is presented and discussed. The present system was evaluated in vinegar acidity determinations and provided an accuracy better than 3% with a good repeatability (relative standard deviation (RSD) = 2.5%; n = 10) and reproducibility (RSD < 5%). The titration accuracy is time-dependent and has been tested in the 2-10 min range.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11