NMR-Based Multi Parametric Quality Control of Fruit Juices: SGF Profiling

Abstract

With SGF Profiling™ we introduce an NMR-based screening method for the quality control of fruit juices. This method has been developed in a joint effort by Bruker BioSpin GmbH and SGF International e.V. The system is fully automated with respect to sample transfer, measurement, data analysis and reporting and is set up on an Avance 400 MHz flow-injection NMR spectrometer. For each fruit juice a multitude of parameters related to quality and authenticity are evaluated simultaneously from a single data set acquired within a few minutes. This multimarker/multi-aspect NMR screening approach features low cost-per-sample and is highly competitive with conventional and targeted fruit juice quality control methods.

Facilitating the performance of qNMR analysis using automated quantification and results verification

“…However, for high‐throughput measurements automated processing programs are preferred . Some efforts have been made in (semi)automated compound identification and quantification using reference databases based on NMR spectroscopic profiles .…”

“…Some efforts have been made in (semi)automated compound identification and quantification using reference databases based on NMR spectroscopic profiles . Several software packages have been developed to support automatic spectral analysis of specific matrices . However, most of these routines work in ‘black box’ mode, and operator cannot control the accuracy of the program output.…”

Effects of L-ascorbic acid addition on micro-filtered coconut water: Preliminary quality prediction study using 1H-NMR, FTIR and GC-MS

“…Chemical shift between δ =1.0 to 1.04 ppm (Fig. 2c) (Cazor et al, 2006;Spraul et al, 2009) and N-H stretch of primary amine at 810.20 cm − 1 (Fig. 3c) are mainly caused by free amino acids like D-valine (RT = 6.31 min).…”

“…FTIR is an optimal method for measuring oil rancidity (Innawong et al, 2004). 1 H-NMR spectroscopy has been demonstrated to be an efficient tool in fruit juice and beverage authentication (Cuny et al, 2008;Spraul et al, 2009). Several authors have used one dimensional 1 H-NMR spectra for tentative identification of compositional information in high-water-content food systems like aqueous carrot root extract (Cazor, Deborde, Moing, Rolin, & This, 2006), cider apple juices (Campo, Santos, Iturriza, Berregi, & Munduate, 2006), orange and grapefruit juices (Cuny et al, 2008), milk, orange and apple juices (Eads & Bryant, 1986).…”

Juice Analysis in Citrus: Latest Developments

“…However, driven by the emerging trend and economical bene fi t involved in foods quality control procedures and origin authenticity, it has rapidly expanded into the fi eld of mixture analysis and multiple screening over the past few years (Spraul et al 2008 ;Vogels et al 1996 ) . Moreover, the creation of a rich reference spectral database makes NMR spectroscopy combined with statistical multiparametric analysis an outstanding routine tool for Citrus juice quality certi fi cation, able to easily verify the presence of contaminations and frauds such as wrong labeling of the product or the type and origin of ingredients (Spraul et al 2009 ) (Fig. 7.5 ).…”