Issue |
Analusis
Volume 26, Number 4, May 1998
Proche Infrarouge PIRPittcon 98 |
|
---|---|---|
Page(s) | 182 - 186 | |
Section | Original articles | |
DOI | https://doi.org/10.1051/analusis:1998131 |
DOI: 10.1051/analusis:1998131
Construction and evaluation of a crystalline silver double-membrane tubular potentiometric detector for flow injection analysis. Application to chloride determination in wine
C.M.C.M. Couto, J.L.F.C. Lima and M.C.B.S.M. MontenegroCEQUP, Departamento de Química-Física, Faculdade de Farmácia (UP), Rua Aníbal Cunha 164- 4050 Porto, Portugal
Abstract
This paper describes the construction and assessment of the operating characteristics and analytical usefulness of a homogeneous crystalline silver double membrane tubular electrode with
increased sensitivity. The constructed electrodes allowed Ag(I) determinations in the
M range with a calibration slope of 114 mV dec-1 and with good reproducibility
(0.6 mV). The development and application of a flow injection analysis system manifold for chloride determinations in wine samples, in a wide concentration range (
10 - 800 mg L-1), with a
titrant consumption of 90
g determination-1 is also described. The results obtained from the analysis of 12 wine samples showed good agreement between the proposed method and the
refer-ence one, accomplishing
90 - 200 samples h-1
Key words: Tubular electrode / increased sensitivity / chloride / wine / FIA.
© EDP Sciences, Wiley-VCH 1998