Response surface modelling of lead pre-concentration from food samples by miniaturised homogenous liquid-liquid solvent extraction: Box-Behnken design

► Lead is toxic element. ► Extracting trace amounts of lead from food samples is essential. ► Homogenous liquid-liquid solvent extraction method is simple, efficient and fast. ► It uses extracting solvent at a microlitre level. ► As a result, this method is suitable for the environment.