The resulting mixture was evaporated under a stream of nitrogen gas to dryness. Extraction was repeated twice. Spectrophotometric method was performed according to Canizares-Macias, et al., (2001) for quantification.
The resulting mixture was evaporated under a stream of nitrogen gas to dryness. Extraction was repeated twice. Spectrophotometric method was performed according to Canizares-Macias, et al.,(2001) for quantification.