Today the NMR spectroscopy finds an important application in the Metabolomic studies for example in biological fluids such as urine, plasma and blood. In recent decades, however, through a lot of methodological and instrumental developments many new useful applications were added. For example, reaction products can be determined, reaction mechanisms are elucidated or structural isomers are identified. In the beginning NMR spectroscopy was only used to solve the organic and inorganic structural problems. NMR spectroscopy is a reliable method to detect any deviation of the content to the informations on the Labelling. Maintaining a specific quality of the food and drinks today is a challenge for any manufacturer, because of today's modern methods by which impurities and fraud such as incorrect labeling of the product type or the type and origin of the ingredients.
#Mestrenova compared spectra how to#
4.1 Identification of metabolites in the extracted apple juiceĤ.1.1 Identification of metabolites in the commercial apple juicesĤ.1.2 Investigation of the vitamine C contentĤ.1.3 Comparison of the relative metabolite concentrationĤ.1.4 Mixing of unripe fruits in apple juicesĤ.2 Identification of metabolites in the orange juicesĤ.3 Identification of metabolites in the multivitamine juicesĤ.4 Sugar content in commercial fruit juicesĤ.5 Changes in the fruit juice sample after three weeksĥ.3 Differences between premium- and discountbrandsĦ.1.2 Preparation of phosphate buffer (pH 6 - 7 at 25☌)Ħ.2 Running an NMR Experiment using TOPSPIN as softwareĦ.2.1 Insertion of sample tube into the spinnerĦ.2.4 Acquiring FID signal and modifying acquisition parametersĦ.2.5 Processing the 1H NMR spectra with TOPSPINĦ.3.1 Displaying the spectra with Amix ViewerĦ.3.2 How to show a series of spectra on top of selected spectrumĦ.3.4 Creating a new spectra base (Sbase)Ħ.3.5 Displaying spectra in overlaid modeĦ.3.6 Displaying a series of spectra in horizontal- and vertical splittingĦ.3.7 Showing a series of spectra on top of selected spectrumĪbbildung in dieser Leseprobe nicht enthalten 2.
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