ION-SELECTIVE ELECTRODES FOR POTASSIUM AND CALCIUM WITH A SUMMING OPERATIONAL-AMPLIFIER - AN ASSESSMENT OF THEIR ANALYTICAL USEFULNESS IN DETERMINATION OF PARENTERAL AND HEMODIALYSIS SOLUTIONS

• Type: Article in International Scientific Journal
• Date: 1993

Authors

Lapa, RAS (Author) FFUP; Lima, JLFC (Author) FFUP; REIS, MDH (Author) Other

Journal

Title: Farmaco

Vol. 48

Pages: 1605-1616

ISSN: 0014-827X

Publisher: Elsevier B.V.

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 6 Citations

Other information

Authenticus ID: P-001-MG4

Abstract (EN): This paper describes the construction, assessment of the working characteristics, and analytical usefulness of ion selective electrodes with a summing operational amplifier without an inner reference solution and compares them to conventional ion-selective electrodes. The quality of the response of these units was assessed by examining their sensitivity, lower limit of linear response and detection, potential stability, potentiometric selectivity coefficients, response time, and pH effect (Reilley diagrams). The analytical usefulness of these ion selective electrodes with a summing operational amplifier was verified by direct potentiometric potassium determinations in parenteral solutions, and the sequential titration of calcium and magnesium in haemodialysis solutions. The results by potentiometry are in good agreement with those obtained with conventional procedures and are more precise.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12