کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1169379 | 960632 | 2008 | 6 صفحه PDF | دانلود رایگان |
A HPLC method using a coulometric electrode array detector (CEAD) to analyse 4-ethylcatechol in wine was established. The procedure does not require any sample preparation or analyte derivatisation and performs chromatographic separation in a short time. The assay method is linear up to 1520 μg L−1 and precise (R.S.D. < 3%), with limits of detection and quantitation of 1.34 μg L−1 and 2.2 μg L−1, respectively. Recoveries in spiked wine samples ranged from 95% to 104% with a median value of 102% and matrix effects were not observed. The method was applied to the evaluation of the concentration of 4-EC in 250 commercial Italian wines. The red wines analysed had median, 75° percentile and maximum values of 37 μg L−1, 89 μg L−1 and 1610 μg L−1, respectively. For Sangiovese-based wines the mean ratios of 4-EP and 4-EG to 4-EC were 3.7:1 and 0.7:1, respectively. The feasibility of a cheaper fluorimetric approach to 4-EC quantification was investigated.
Journal: Analytica Chimica Acta - Volume 609, Issue 2, 25 February 2008, Pages 235–240