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ANALYTICA CHIMICA ACTA, 2001, VOL. 448, PP. 201-206
Direct Olive Oil Anisidine Value Determination by Flow Injection
Eleni P. Labrinea, Nikolaos S. Thomaidis, Constantinos A. Georgiou*
Chemistry Laboratory, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece
Full Article-PDF (69 K)
A flow injection (FI) spectrophotometric method for the determination of olive oil anisidine value (AV) is presented. 10% (w/v) olive oil samples in propanol-2 are injected in a p-anisidine in propanol-2 / acetic acid stream. The reagents are premixed in the FI system using a two-line manifold. Detection is achieved by monitoring absorbance continuously at 350 nm. The proposed FI method achieves a high analysis rate (110 samples per hour), minimizes solvent consumption (1 ml propanol-2 and 0.4 ml acetic acid per analysis) and compares well with the manual spectrophotometric method (relative difference 0.5-6.8% for the analysis of 25 olive oil samples). Precision was found to be better than 1.0% RSD (n=7). The linear range was 6-85 AV and is suitable for analysis of abused olive oils.
Keywords: Olive Oil; Flow Injection; Anisidine Value; Spectrophotometry
* Corresponding author.
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