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Recebido em 30/7/08; aceito em 9/12/08; publicado na web em 30/4/09 The carrot leaf dehydration conditions in air circulation oven were optimized through response surface methodology (RSM) for minimizing the degradation of polyunsaturated fatty acids, particularly alpha-linolenic (LNA, 18:3n-3). The optimized leaf drying time and temperature were 43 h and 70 °C, respectively. The fatty acids (FA) were investigated using gas chromatography equipped with a flame ionization detector and fuseddoi:10.1590/s0100-40422009000500042 fatcat:5i7yh35ivfc3tf6x75tq2c3tya