Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

Technology and methodology for better authenticity and quality determination of fruit juices

Nine hundred authentic samples have been taken and analysed from specialized laboratories selected by an international expert panel after a ringtest. Near infrared reflectance spectroscopy (NIR) has been shown to be a fast and accurate method for sugar, proteins, fat and moisture determinations in the food industry. However, unless complemented by other techniques, such as chromatographic column or other concentrating or separative techniques, NIR will not provide a means of detecting all forms of adulteration. Even so, NIR has been shown to be sensitive to adulterations by sugar and pulpwash under ideal conditions. The Fourier transform infrared (FTIR) NIR technique offers advantages over NIR for juice concentrates (but it is not yet established) if the scanning of dilute or single strength juices can be analysed by FTIR, NIR with the same rapidity and accuracy. Finally, multivariate statistical methods for the authenticity control of fruit juices were worked out and applied.

The European data bank, which was created within the scope of the project using analytical results from authentic samples, supports the organization within the scope of its task as defined in the Statutes to supervise the quality of the fruit drinks. With regard to the International Raw Material Assurance (IRMA), the results of the project play an important role in supporting the preventive quality control for securing the quality of fruit juices. The access to the data bank will also be open to parties interested in quality control.

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