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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1993

Autores

Lapa, RAS (Autor) FFUP; Lima, JLFC (Autor) FFUP; REIS, MDH (Autor) Outra

Revista

Título: Farmaco

Vol. 48

Páginas: 1605-1616

ISSN: 0014-827X

Editora: Elsevier B.V.

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12