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Direct chromatographic methods for the rapid determination of homogentisic acid in strawberry tree (Arbutus unedo L.) honey

Scanu, Roberta and Spano, Nadia and Panzanelli, Angelo and Pilo, Maria Itria and Piu, Paola Costantina and Sanna, Gavino and Tapparo, Andrea (2005) Direct chromatographic methods for the rapid determination of homogentisic acid in strawberry tree (Arbutus unedo L.) honey. Journal of Chromatography A, Vol. 1090 (1-2), p. 76-80. ISSN 0021-9673. Article.

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DOI: 10.1016/j.chroma.2005.06.092

Abstract

Two rapid and direct chromatographic methods based on reverse phase-high performance liquid chromatography (RP-HPLC) and ion chromatography (IC) were developed for the determination of homogentisic acid (HA) in honey. This is the marker of the botanic origin of strawberry tree honey. The methods were validated and tested using 22 samples from Sardinia, Italy. The IC method is faster than the RP-HPLC one (6 min versus 13 min of total run), but it is slightly less sensitive (the limit of detection (LOD), is 26 mg kg−1 versus 15 mg kg−1) and reproducible (relative standard deviation, RSD, of 10.4 and 4.4%, respectively). The whole dataset of validation parameters allows both the proposed methods to be considered as bias-free (by recovery tests, comparison of analytical results of the two independent methods and analysis of a synthetic sample) and precise (both the techniques show a repeatability better than 2% repeatability in the range between 70 and 600 mg kg−1).

Item Type:Article
ID Code:3773
Status:Published
Refereed:Yes
Uncontrolled Keywords:Strawberry tree, honey, homogentisic acid, RP-HPLC, IC
Subjects:Area 03 - Scienze chimiche > CHIM/01 Chimica analitica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier
ISSN:0021-9673
Deposited On:28 Apr 2010 10:55

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