Mathematical modelling of sequential determinations by flow-injection sandwich techniques

• Type: Article in International Scientific Journal
• Date: 1990

Authors

Montesinos, JL (Author) Other; Bartroli, J (Author) Other; Poch, M (Author) Other; del Valle, M (Author) Other; Lima, JLFC (Author) FFUP; Araujo, AN (Author) FFUP

Journal

Title: Analytica Chimica Acta

Vol. 234

Pages: 67-74

ISSN: 0003-2670

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 17 Citations

Other information

Authenticus ID: P-008-PJC

DOI: 10.1016/0003-2670(91)90024-y

Abstract (EN): Preliminary results obtained in the evaluation of a mathematical model for flow-injection systems, including chemical kinetics, with an eight-way injection valve are presented. The use of this kind of injection valve permits the insertion of the sample bolus between two different reagent solutions (sandwich techniques). The model considers the system as a tubular reactor with axially dispersed plug flow. As an example for systems with chemical reaction, the enzymatic determination of glucose was chosen. The parameters of the model (dispersion coefficients and reaction rate constants) were experimentally evaluated by using a tracer or by unidirectional optimization, respectively. The effect of different parameters of the flow system on the analytical signal for one analyte and one reagent was simulated, and the model results are compared with experimental data obtained under the same conditions. © 1990.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11