Determination of carbon-13 content of sugars of fruit and vegetable juices: A European inter-laboratory comparison

✍ Scribed by J. Koziet; A. Rossmann; G.J. Martin; P.R. Ashurts

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 546 KB
• Volume: 271
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80548-y

✦ Synopsis

An inter-laboratory companson, orgamzed by a workmg group of the techmcal comnuttee for the analysis of fruit and vegetable JUPXS of the European Commission of Standardization (CEN/TC 1741, was carned out between fifteen laboratones m seven European countries on the determmatlon of the carbon-13 content of sugars of fnut JWXS Each laboratory received two randomly selected samples, each of 250 ml, of orange and pmeapple juice and two samples, each of 50 g, of sucrose from beet and cane sources The determmation of carbon-13 m sugars of fruit JUKXS was evaluated using the same experunental protocol but under different conditions (operator, spectrometer, penod of tune) The results obtamed for ttus method were consIdered to be acceptable by specmhsts m the field of isotopic analysis the repeatability (r) and reproduckuhty (R) obtained m the ring test were 0 3%0 and 0 7%0, respectively, according to the IS0 Standard 57251986 Keywords Mass spectrometfy, Carbon-13, Collaborative studies, Fruit JUN%S, Sugars, Vegetable juices This comparison was orgamsed wlthm the framework of CEN/TC 174, w&h 1s a technical committee for the analysis of frmt and vegetable Juices of the European Committee for Standardlzatlon [l], which was formed m November 1988 by the CEN Techrucal Board (CEN/BT) The ObJectives of the CEN/TC 174 Technical Com-Correspondence to J Konet, Pemod-kcard Research Centre, 120 Avenue du Mar&ha1 Foch, F-94015 Creted (France)