A rapid and automated low resolution NMR method to analyze oil quality in intact oilseeds.
Oilseeds with modified fatty acid profiles have been the genetic alternative for high quality vegetable oil for food and biodiesel applications. They can provide stable, functional oils for the food industry, without the hydrogenation process that produces trans-fatty acid, which has been linked to cardiovascular disease. High yield and high quality oilseeds are also necessary for the success of biodiesel programs, as polyunsaturated or saturated fatty acid oil produces biofuel with undesirable properties. In this paper, a rapid and automated low resolution NMR method to select intact oilseeds with a modified fatty acid profile is introduced, based on 1H transverse relaxation time (T2). The T2 weighted NMR signal, obtained by a CPMG pulse sequence and processed by chemometric methods was able to determine the oil quality in intact seeds by its fatty composition, cetane number, iodine value and kinematic viscosity with a correlation coefficient r > 0.9. The automated system has the potential to analyze more than 1000 samples per hour and is a powerful tool to speed up the selection of high quality oilseeds for food and biodiesel applications.
Prestes
Rosilene Aparecida
RA
Universidade de São Paulo, Instituto de Química de São Carlos, Av. Trabalhador São-Carlense 400, São Carlos, SP 13560-970, Brazil.
Colnago
Luiz Alberto
LA
Forato
Lucimara Aparecida
LA
Vizzotto
Lucinéia
L
Novotny
Etelvino Henrique
EH
Carrilho
Emanuel
E
D005227:Fatty Acids / Q000032:analysis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010938:Plant Oils / Q000032:analysis*; D012639:Seeds / Q000737:chemistry; D013997:Time Factors
D005227:Fatty Acids; D010938:Plant Oils