NMR quantification of 16-O-methylcafestol and kahweol in Coffea canephora var. robusta beans from different geographical origins

Alves, 2009, Discrimination between arabica and robusta coffee species on the basis of their tocopherol profiles, Food Chemistry, 114, 295, 10.1016/j.foodchem.2008.08.093 Berti, 2006, Chemoenzymatic synthesis of diastereomeric ethyl γ-benzyl paraconates and determination of the absolute configurations of their acids, Tetrahedron: Asymmetry, 17, 2344, 10.1016/j.tetasy.2006.08.013 Campanha, 2010, Discrimination of coffee species using kahweol and cafestol: Effects of roasting and of defects, Coffee Science, 5, 87 Casal, 2003, Discrimination between arabica and robusta coffee species on the basis of their amino acid enantiomers, Journal of Agricultural and Food Chemistry, 51, 6495, 10.1021/jf034354w Casal, 2000, Discriminate analysis of roasted coffee varieties for trigonelline, nicotinic acid, and caffeine content, Journal of Agricultural and Food Chemistry, 48, 3420, 10.1021/jf990702b Cizkova, 2007, Differentiation of coffee varieties according to their sterolic profile, Journal of Food and Nutrition Research, 46, 28 Davis, 2006, An annotated taxonomic conspectus of the genus Coffea (Rubiaceae), Botanical Journal of the Linnean Society, 152, 465, 10.1111/j.1095-8339.2006.00584.x De Angelis, 2014, Coffee diterpenes: From green beans to espresso coffee, 42 Defernez, 2017, Low-field 1H NMR spectroscopy for distinguishing between arabica and robusta ground roast coffees, Food Chemistry, 216, 106, 10.1016/j.foodchem.2016.08.028 Deutsches Institut für Normung e.V. (DIN). Standard DIN 10779, 2011 Dias, 2014, Roasting process affects the profile of diterpenes in coffee, European Food Research and Technology, 239, 961, 10.1007/s00217-014-2293-x D'Amelio, 2013, Green coffee oil analysis by high-resolution nuclear magnetic resonance spectroscopy, Talanta, 110, 118, 10.1016/j.talanta.2013.02.024 González, 2001, HPLC analysis of tocopherols and triglycerides in coffee and their use as authentication parameters, Food Chemistry, 73, 93, 10.1016/S0308-8146(00)00282-X Grembecka, 2007, Differentiation of market coffee and its infusions in view of their mineral composition, The Science of the Total Environment, 383, 59, 10.1016/j.scitotenv.2007.04.031 Guercia, 2016, Isolation and characterization of major diterpenes from C. canephora roasted coffee oil, Tetrahedron: Asymmetry, 27, 649, 10.1016/j.tetasy.2016.06.008 Hovell, 2010, Evaluation of alignment methods and data pretreatments on the determination of the most important peaks for the discrimination of coffee varieties Arabica and Robusta using gas chromatography-mass spectroscopy, Analytica Chimica Acta, 678, 160, 10.1016/j.aca.2010.08.029 Keidel, 2010, Discrimination of green arabica and Robusta coffee beans by Raman spectroscopy, Journal of Agricultural and Food Chemistry, 58, 11187, 10.1021/jf101999c Kölling-Speer, 2006, Diterpenes in green coffees harvested in different years, 197 Ky, 2001, Caffeine, trigonelline, chlorogenic acids and sucrose diversity in wild Coffea arabica L. and C. canephora P. accessions, Food Chemistry, 75, 223, 10.1016/S0308-8146(01)00204-7 Mariani, 1991, Sterols of coffee grain of Arabica and Robusta species, La Rivista Delle Sostanze Grasse, 68, 111 Martín, 1999, Characterization of arabica and robusta roasted coffee varieties and mixture resolution according to their metal content, Food Chemistry, 66, 365, 10.1016/S0308-8146(99)00092-8 Martín, 2001, Fatty acid profiles as discriminant parameters for coffee varieties differentiation, Talanta, 54, 291, 10.1016/S0039-9140(00)00647-0 Monakhova, 2015, Rapid approach to identify the presence of Arabica and Robusta species in coffee using 1H NMR spectroscopy, Food Chemistry, 182, 178, 10.1016/j.foodchem.2015.02.132 Pablos, 1999, Determination of the arabica/robusta composition of roasted coffee according to their sterolic content, The Analyst, 124, 999, 10.1039/a902245g Pacetti, 2012, Authentication of Italian Espresso coffee blends through the GC peak ratio between kahweol and 16-O-methylcafestol, Food Chemistry, 135, 1569, 10.1016/j.foodchem.2012.06.007 Romano, 2014, Identification markers based on fatty acid composition to differentiate between roasted Arabica and Canephora (Robusta) coffee varieties in mixtures, Journal of Food Composition and Analysis, 35, 1, 10.1016/j.jfca.2014.04.001 Rubayiza, 2005, Chemical discrimination of arabica and robusta coffees by Fourier transform Raman spectroscopy, Journal of Agricultural and Food Chemistry, 53, 4654, 10.1021/jf0478657 Rui Alves, 2003, Contribution of FA profile obtained by high-resolution GC/chemometric techniques to the authenticity of green and roasted coffee varieties, Journal of the American Oil Chemists’ Society, 80, 511, 10.1007/s11746-003-0730-0 Schievano, 2014, Rapid authentication of coffee blends and quantification of 16-O-methylcafestol in roasted coffee beans by nuclear magnetic resonance, Journal of Agricultural and Food Chemistry, 62, 12309, 10.1021/jf505013d Servillo, 2016, Homostachydrine (pipecolic acid betaine) as authentication marker of roasted blends of Coffea arabica and Coffea canephora (Robusta) beans, Food Chemistry, 205, 52, 10.1016/j.foodchem.2016.02.154 Souza, 2012, Discrimination of commercial roasted and ground coffees according to chemical composition, Journal of the Brazilian Chemical Society, 23, 1347, 10.1590/S0103-50532012000700020 Spaniolas, 2008, Evaluation of DNA extraction methods from green and roasted coffee beans, Food Control, 19, 257, 10.1016/j.foodcont.2007.04.002 Speer, 2001, Lipids, 33 Trantakis, 2012, Dipstick test for DNA-based food authentication. Application to coffee authenticity assessment, Journal of Agricultural and Food Chemistry, 60, 713, 10.1021/jf203180h Wermelinger, 2011, Quantification of the robusta fraction in a coffee blend via raman spectroscopy: Proof of principle, Journal of Agricultural and Food Chemistry, 59, 9074, 10.1021/jf201918a