Simultaneous Determination of Omethoate and Dichlorvos by Capillary Electrophoresis

Abstract

A capillary electrophoresis method has been developed for the analysis of omethoate and dichlorvos. Response surface methodology (RSM) was used to optimize the separate conditions for simultaneous detection of omethoate and dichlorvos. The results indicated that the optimal conditions for omethoate and dichlorvos determination were; pH 7.64, SDS concentration 67.5 mM, separation voltage 19.0 KV. Quantitative linear ranges were 1.0-300 microg/mL for omethoate and dichlorvos with correlation of 0.9967 and 0.9965, respectively. The limits of detection were 0.046 microg/mL and 0.031 microg/mL for omethoate and dichlorvos, with relative standard deviations (R.S.D.) <3.6%. The value of recoveries for omethoate and dichlorvos were arranged from 94.1% to 106.0%.

The simultaneous determination of omethoate and dichlorvos pesticides in grain samples using a palladium and graphene composite modified glassy carbon electrode

“…The detection limit values were found to be 2.47 Â 10 À10 M and 3.28 Â 10 À10 M for OMT and DCV respectively, which compare well with the detection limits obtained previously. [36][37][38] Thus, these results clearly indicate that the proposed electrochemical method of analysis is reliable for the determination of the individual pesticides (Fig. 8).…”

“…37 Yugui Tao et al reported on the simultaneous determination of OMT and DCV by capillary electrophoresis. 38 Nevertheless, to the best of our knowledge, there is no electroanalytical report concerning the simultaneous determination of OMT and DCV using a palladium and graphene nanocomposite modied glassy carbon electrode.…”

Simultaneous quantification of the organophosphorus pesticides dimethoate and omethoate in porcine plasma and urine by LC–ESI-MS/MS and flow-injection-ESI-MS/MS

“…For detection of dimethoate and omethoate in soil and vegetables, capillary electrophoresis with MS detection after ionization by inductively coupled plasma (CE-ICP-MS) or UV-detection (CE-UV) has been rarely used [19,20]. In contrast, residues of both pesticides in different specimens (olive oil, olives, juice, urine and plasma) have often been quantified by more traditional gas chromatographic (GC) separation coupled to diverse detection techniques, e.g.…”