This article presents a new and sensitive method for the determination of trace amounts of fungicide
carbendazim by dispersive liquid–liquid microextraction (DLLME) combined with UV–vis spectrophotometry.
The method is based on the reduction of Fe(III) to Fe(II) by carbendazim, its reaction with
potassium ferricynide to form a blue product and extraction into CCL4 by DLLME technique using
methyltrioctylammonium chloride (Aliquat 336) as a disperser agent. Under the established optimum
conditions, the calibration graph was linear in the range of 5–600 ng mL1 of carbendazim with a limit
of detection of 2.1 ng mL1
. The relative standard deviations for eight replicate determinations of 50 and
300 ng mL1 of carbendazim were 3.9% and 1.0%, respectively. The proposed method was successfully
applied to determination of carbendazim in soil and water samples.