Determinação de Carbofurano em Caldo de Cana Utilizando a Extração Líquido-Líquido com Partição à Baixa Temperatura e Análise por Cromatografia Líquida

Abstract

The use of pesticides has been intensified to meet market demand. Brazil is the largest sugar cane producers in the world and one of its forms of consumption is raw cane juice popularly known as garapa. There is no legislation in the country that addresses parameters for the determination of pesticides in the sugarcane juice, therefore the marketing of the drink does not follow any quality control. The objective of this research was to evaluate the use of the Liquid-Liquid Extraction with Low Temperature Partitioning (LLE-LTP) method in relation to the selectivity, applicability, and effect of the addition of sodium chloride to determine the pesticide carbofuran in sugarcane juice and subsequent analysis of real samples of sugarcane juice sold in the city of Itumbiara -GO. This method is simple and effective, consuming small amounts of solvents and has advantages over other extraction techniques, such as practicality and low consumption of sample and organic solvent. The percentage of carbofuran extraction by (LLE-LTP) was 96.94-102.68% with coefficients of variation below 2.0%. The addition of sodium chloride did not show a statistically significant change in the percentage of carbofuran extraction. Samples of the sugarcane juice acquired in the Itumbiara -GO, submitted to the optimized method did not present any carbofuran residues.