Fig. 7. The spectra of sedimented carbendazim from soil sample 1 (a) soil sample
alone (b) soil sample spiked with 50 ng mL1 and (c) soil sample spiked with
100 ng mL1
of carbendazim, conditions: sample volume, 10 mL; carbendazim
concentration, 500 ng mL1
; Fe(ΙΙΙ) concentration, 0.5 mg L1
; K3[Fe(CN)6] concentration,
16 mmol L1
; pH of solution, 3; time and temperature equilibration,
50 1C for 2 min; H3PO4 concentration, 0.01 mol L1
; centrifugation time, 5 min