3a and c). However, since the main goal is to discriminate pure and adulterated coffee, an evaluation

of the calculated values of each discriminant function at the group centroids ( Table 3) shows that, depending on the model, the first three discriminant functions are enough to provide sample classification. For example, in the model based on first derivatives, pure coffee presented positive www.selleckchem.com/products/SP600125.html values for DF2 and negative values for DF1 and DF3, whereas adulterated samples presented positive values for DF2 and DF3 and negative values for DF1. All models presented 100% recognition and prediction abilities when employing 5 discriminant functions. Such results confirm that DRIFTS provides satisfactory discrimination between roasted coffee and adulterants, being able to differentiate between pure coffee and coffee adulterated by one or several of the materials commonly employed for it. This is particularly interesting in terms of establishing a fast and reliable methodology for detection of adulteration in ground roasted coffee. As in our previous study ( Reis et al., 2013), we emphasize that the analysis has been carried out using a representative range of roasting conditions, and that variations learn more in roasting degree and temperature did not affect discrimination. The feasibility of employing

DRIFTS as a methodology for simultaneous discrimination between roasted coffee and multiple adulterants (coffee husks, spent coffee grounds, barley and corn) was confirmed. LDA classification models presented recognition and prediction abilities of 100%, being able to detect adulteration levels as low as 1 g/100 g. The results herein obtained confirm that DRIFTS can be employed for detection of adulteration in roasted and ground coffee. The authors acknowledge financial support from the following Brazilian Government Agencies:CAPES, CNPq the and FAPEMIG. “
“Events Date and Venue Details from Cereals and Europe Spring Meeting 29-31 May 2013 Leuven, Belgium Internet:

http://cespringmeeting2013.org 17th Gums & Stabilisers for the Food Industry Conference 25-28 June 2013 Wrexham, UK Internet: http://www.foodhydrocolloidstrust.org.uk/ Australian Society for Microbiology Annual Meeting 7-10 July 2013 Adelaide, Australia Internet: http://www.theasm.org.au/meetings/asm-adelaide-2013/ American Dairy Science Association Annual Meeting 8-12 July 2013 Indianapolis, USA Internet: http://jtmtg.org/2013/ IFT Annual Meeting 13-16 July 2013 Chicago, USA Internet: www.ift.org FEMS 2013 21-25 July 2013 Leipzig, Germany Internet: http://fems.kenes.com/congress-information/welcome/ International Association of Food Protection Annual Meeting 28-31 July 2013 Charlotte, North Carolina, USA Internet: www.foodprotection.org 10th Pangborn Sensory Science Symposium 10-13 August 2013 Rio di Janeiro, Brazil Internet: http://www.pangborn2013.