1. Graduate Program in Chemistry, Chemical Metrology Laboratory, Federal University of Pelotas, Capão do Leão, Rio Grande do Sul, Brazil
2. Embrapa Instrumentation, São Carlos, São Paulo, Brazil
3. School of Chemical and Food, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
4. Embrapa Temperate Agriculture, Pelotas, Rio Grande do Sul, Brazil