Determination of lithium in wines by ion chromatography

O. Zerbinati, F. Balduzzi, V. Dell'Oro

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

Lithium ion can be added as a denaturing agent to wines unsuitable for consumption. Accuracy of flame atomic emission spectroscopy with direct nebulization, which is commonly adopted for discovering illegal use of denatured wines, was found to be compromised by Na+, K+, NH4/+, Mg2+, Ca2+ and ethanol contained in wine. Ion chromatography (IC) was tested in order to propose an alternative method for legal controls. Experimental design was used to investigate the influence on the accuracy of the determination of Li+ at ppb levels, of Na+ and ethanol content of wine and of fluctuations of eluent flow-rate and composition. It turned out that IC quantification of Li+ can be affected by eluent parameters rather than by wine composition. Since the former can be maintained under the operators control, while the latter cannot, IC was judged preferable to AES for legal controls of Li+ in wines. (C) 2000 Elsevier Science B.V.

Lingua originaleInglese
pagine (da-a)645-650
Numero di pagine6
RivistaJournal of Chromatography A
Volume881
Numero di pubblicazione1-2
DOI
Stato di pubblicazionePubblicato - 9 giu 2000
Pubblicato esternamente

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