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Rapid detection of walnut and pumpkin oil adulteration using Raman spectroscopy and partial least square methodology

A. Becze,D. Simedru

Published 2020 in Notulae Botanicae Horti Agrobotanici Cluj-napoca

ABSTRACT

The purpose of this study is to develop a statistical method, based on Raman spectroscopy results, to quickly identify the adulteration of pumpkin and walnut oils. For this purpose, pure pumpkin and walnut oils from Cluj County, Romania were studied with Raman techniques. They were adulterated with sunflower oil at 14 levels of concentration, ranging from 2.5 to 50%. The areas under the significant peaks were quantified and compared. A statistical method using the partial least square methodology was developed and used as a prediction tool in order to establish the adulteration percentage for pumpkin and walnut oils. 4 components were used to model the equation, the peak areas from ~1264, ~1300, ~1441 and respectively ~1659 cm-1. The final model equations take into account only the peak areas that had a high impact on the prediction values, statistically proven using the p-value. The level of prediction obtained with the final model equation was ≥ 95%.

PUBLICATION RECORD

  • Publication year

    2020

  • Venue

    Notulae Botanicae Horti Agrobotanici Cluj-napoca

  • Publication date

    2020-09-08

  • Fields of study

    Materials Science, Chemistry

  • Identifiers
    DOI 10.15835/nbha48312024
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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