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Titolo:
FLOW-INJECTION, AMPEROMETRIC DETERMINATION OF ETHANOL IN WINES AFTER SOLID-PHASE EXTRACTION
Autore:
CHEN ZL; YU JJ; HIBBERT DB;
Indirizzi:
UNIV NEW S WALES,DEPT ANALYT CHEM SYDNEY NSW 2052 AUSTRALIA UNIV NEW S WALES,DEPT ANALYT CHEM SYDNEY NSW 2052 AUSTRALIA
Titolo Testata:
Electroanalysis
fascicolo: 7, volume: 9, anno: 1997,
pagine: 541 - 543
SICI:
1040-0397(1997)9:7<541:FADOEI>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
POTENTIOMETRIC DETERMINATION; ELECTROCATALYTIC OXIDATION; LIQUID-CHROMATOGRAPHY; MODIFIED ELECTRODE; VOLTAMMETRY; SUGARS;
Keywords:
AMPEROMETRIC DETECTION; SOLID-PHASE EXTRACTION; FLOW INJECTION ANALYSIS; NICKEL ELECTRODE; ETHANOL; WINE ANALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
Z.L. Chen et al., "FLOW-INJECTION, AMPEROMETRIC DETERMINATION OF ETHANOL IN WINES AFTER SOLID-PHASE EXTRACTION", Electroanalysis, 9(7), 1997, pp. 541-543

Abstract

Ethanol in wines was determined by flow injection analysis with an amperometric detector using an oxidized nickel wire. Solid-phase extraction with a strong anion exchanger was used to remove interferences such as organic acids from the matrix, and the residue of the extraction was injected directly into the FIA system. The recoveries of ethanol from wines spiked with standards ranged from 101 % to 103 %. The response of the nickel electrode to ethanol is dependent on the applied potential and the pH of the carrier. The optimal conditions for the detection of ethanol were an applied potential of +0.60 V (vs. Ag/AgCl) in acarrier of 100 mM sodium hydroxide solution. The electrode exhibited a linear response from 10(-5) to 10(-3) M, with a detection limit of 1x 10(-6) M. The method was demonstrated by the determination of ethanol in wines.

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Documento generato il 22/09/18 alle ore 02:04:54