Publication
Construction and use of a tubular picrate ion-selective electrode for reducing sugar determination in Port wine by flow-injection analysis
| dc.contributor.author | Lopes, Teresa I. M. S. | |
| dc.contributor.author | Rangel, António O. S. S. | |
| dc.contributor.author | Lima, José L. F. C. | |
| dc.contributor.author | Montenegro, M. Conceição B. S. M. | |
| dc.date.accessioned | 2011-10-11T11:16:52Z | |
| dc.date.available | 2011-10-11T11:16:52Z | |
| dc.date.issued | 1995 | |
| dc.description.abstract | A picrate ion-selective electrode without inner reference solution and based on bis(triphenylphosphoranylidene)ammonium picrate dissolved in 2-nitrophenyloctyl ether was constructed and its characteristics assessed. With respect to reducing sugar determination in Port wine, a tubular electrode based on the same sensor system was developed and incorporated into a flow-injection manifold devised for this determination. The methodology involves a reaction between the reducing sugar and picric acid, the decrease in the picrate concentration being monitored with the tubular electrode. A linear dependence between peak width, at a fixed potential and the logarithm of sugar concentration in the range 25–200 g l−1 was obtained. The proposed system allows wine samples to be injected with no previous treatment and allows a sample throughput of 50 determinations per hour, a relative standard deviation less than 4%, and the results are comparable to the reference procedures. | por |
| dc.description.version | info:eu-repo/semantics/publishedVersion | |
| dc.identifier.citation | LOPES, Teresa I. M. S....[et al] - Construction and use of a tubular picrate ion-selective electrode for reducing sugar determination in Port wine by flow-injection analysis. Analytica Chimica Acta. ISSN 0003.2670. Vol. 308 n.º 1-3 (1995), p.122-128 | por |
| dc.identifier.doi | 10.1016/0003-2670(94)00598-G | |
| dc.identifier.eid | 0029060315 | |
| dc.identifier.uri | http://hdl.handle.net/10400.14/5941 | |
| dc.identifier.wos | A1995RD48900014 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier | por |
| dc.subject | Flow injection | por |
| dc.subject | Ion selective electrodes | por |
| dc.subject | Picrate | por |
| dc.subject | Sugar | por |
| dc.subject | Wine | por |
| dc.title | Construction and use of a tubular picrate ion-selective electrode for reducing sugar determination in Port wine by flow-injection analysis | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| person.familyName | Santos Silva Rangel | |
| person.familyName | Lima | |
| person.givenName | António Osmaro | |
| person.givenName | José | |
| person.identifier | R-000-8FJ | |
| person.identifier.ciencia-id | D61D-7CFB-178A | |
| person.identifier.ciencia-id | 4811-9AA9-D673 | |
| person.identifier.orcid | 0000-0002-6486-8947 | |
| person.identifier.orcid | 0000-0002-8906-9826 | |
| person.identifier.scopus-author-id | 7004827387 | |
| person.identifier.scopus-author-id | 10141079100 | |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 467be022-fd9c-4549-aa48-48ebcc1098eb | |
| relation.isAuthorOfPublication | 71f20aa3-d4ae-40c3-a9ef-27d88442d1e0 | |
| relation.isAuthorOfPublication.latestForDiscovery | 467be022-fd9c-4549-aa48-48ebcc1098eb |