1. Embrapa Instrumentation, Brazilian Agricultural Research Corporation, St. XV de Novembro 1452, P.O. Box 741, 13560-970 São Carlos, São Paulo, Brazil
2. Embrapa Soybean, Brazilian Agricultural Research Corporation, HWY Carlos João Strass, Warta District, P.O.
Box 4006, 86085-981 Londrina, Paraná, Brazil
3. Institute of Chemistry, São Paulo State University (UNESP), Avenue Francisco Degni 55, CEP 14800-060 Araraquara, São Paulo, Brazil