The first analysis step is the targeted analysis to assess the analyzed food matrix on the basis of specific deviations in concentrations ofsingle compounds that may indicate quality problems.Alistofcompounds can be identified and quantified from a single NMR spectrum. The concen- trations of specific components are very important because they allow detecting quality problems like, for example, the addition of sugars Due to the direct proportionality of the integral of the NMR peaks and the number of observed nuclei, NMR is an inherently quantitative tech nique and thus it is an efficient method for concentration determina tion. With appropriate selection of experiments and procedures, the NMR does not need daily prior calibration. The determination of the absolute concentration only requires an external reference compound of known concentration. The absolute intensities of reference and un known spectra are correlated by the measurement of a precise 360 pulse, direct consequence of the principle of reciprocity (Wider & Dreier, 2006). In addition, the capability of NMR to quantify multiple compounds in a mixture, from just one measurement, is a clear advantage over the targeted standard analytical routines, where prior separation of components is often needed, as it allows detection of the appearance of unexpected ingredients and consequently of unknown frauds. The SGF method is constantly being updated; currently concentrations of more than 30 different compounds are determined (depending on the type of juice). Furthermore, meaningful internal relations of these values are cal culated, such as the ratio of glucose and fructose or the ratio of sucrose versus total sugar.