Determination by near-infrared spectroscopy of perseitol used as a marker for the botanical origin of avocado (Persea americana Mill.) honey

L. Dvash, O. Afik, S. Shafir, A. Schaffer, Y. Yeselson, A. Dag, S. Landau*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

This paper reports the application of near-infrared (NIR) reflectance spectroscopy to determine the concentration in honey of perseitol, a sugar that is specific to avocado honey. Reference values for perseitol were obtained by high-performance liquid chromatography analysis in 109 honey samples. Although the average concentration of perseitol in honey samples was only 0.48%, accurate prediction equations were successfully developed. The regression model of modified partial least squares was superior to that of principal component regressions. Calibrations based on the first or second derivative of Log(1/R) were equally good (R2 > 0.95). Using half of the samples for calibration and the second half for validation, the correlation between actual and predicted values of the second half was satisfactory (R2 = 0.87), the slope did not differ from 1, bias was low (0.005%), and the standard error of prediction was relatively low (0.13%). It was concluded that NIRS analysis may be used to detect to what extent honeybees have harvested avocado nectar but not to authenticate avocado honey as unifloral.

Original languageAmerican English
Pages (from-to)5283-5287
Number of pages5
JournalJournal of Agricultural and Food Chemistry
Volume50
Issue number19
DOIs
StatePublished - 11 Sep 2002

Keywords

  • Authenticity
  • Carbohydrates
  • Honey
  • NIRS
  • Product identification
  • Sugars

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