TY - JOUR
T1 - Determination of lithium in wines by ion chromatography
AU - Zerbinati, O.
AU - Balduzzi, F.
AU - Dell'Oro, V.
PY - 2000/6/9
Y1 - 2000/6/9
N2 - 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.
AB - 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.
KW - Food analysis
KW - Lithium
KW - Metal cations
KW - Wine
UR - http://www.scopus.com/inward/record.url?scp=0034625596&partnerID=8YFLogxK
U2 - 10.1016/S0021-9673(00)00261-2
DO - 10.1016/S0021-9673(00)00261-2
M3 - Article
SN - 0021-9673
VL - 881
SP - 645
EP - 650
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1-2
ER -