Mid-Infrared as a New Tool for Detecting Adulteration in Fruit Products

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper illustrates the use of attenuated total reflectance (ATR) spectra of fruit purees or jams, and diffuse reflectance (DRIFT) spectra of jams, to provide the chemical information necessary to check the composition and authenticity of these products. The fingerprint region contains information reflecting the carbohydrate, acid, and pectin content. Although differences between products from different fruit types, or between genuine and adulterated samples, can be seen in the spectra by eye, the samples cannot be identified unambiguously by visual inspection. Statistical methods can aid this identification, however. An example of the use of principal component analysis is presented, enabling genuine raspberry purees to be distinguished from raspberry purees doctored by the addition of sucrose solution to a level of about 6% sucrose.
Original languageEnglish
Title of host publicationProgress in Fourier Transform Spectroscopy
Subtitle of host publicationProceedings of the 10th International Conference, August 27 – September 1, 1995, Budapest, Hungary
EditorsJános Mink, Gábor Keresztury, Robert Kellner
Number of pages2
ISBN (Electronic)978-3-7091-6840-0
ISBN (Print)978-3-211-82931-8
Publication statusPublished - 1997
Event10th International Conference - Budapest, Hungary
Duration: 27 Aug 19951 Sep 1995


Conference10th International Conference

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