Catanionic surfactant ambient cloud point extraction and high-performance liquid chromatography for simultaneous analysis of organophosphorus pesticide residues in water and fruit juice samples

Abstract

A mixed anionic-cationic surfactant cloud point extraction (CPE) has been developed using sodium dodecyl sulfate (SDS) and tetrabutylammonium bromide (TBABr) for the extraction and preconcentration of organophosphorus pesticides (OPPs) at ambient temperature before analysis by high-performance liquid chromatography. The studied OPPs were azinphos-methyl, parathion-methyl, fenitrothion, diazinon, chlorpyrifos, and prothiophos. The optimum conditions of the mixed anionic-cationic CPE were 50 mmol L(-1) SDS, 100 mmol L(-1) TBABr, and 10% (w/v) NaCl. The extracted OPPs were successfully separated within 11 min using the conditions of a Waters Symmetry C8 column, a flow rate of 0.8 mL min(-1), a gradient elution of methanol and water, and detection at 210 nm. Linearity was found over the range 0.05-5 μg mL(-1), with the correlation coefficients higher than 0.996. The enrichment factor of the target analytes was in the range 6-11, which corresponds to their limits of detection from 1 to 30 ng mL(-1). High precisions (intra-day and inter-day) were obtained with relative standard deviation <1.5% (t(R)) and 10% (peak area). Accuracies (% recovery) of the different spiked OPP concentrations were 82.7-109.1% (water samples) and 80.3-113.3% (fruit juice samples). No contamination by the OPPs was observed in any studied samples.

Analytical approach, dissipation pattern and risk assessment of pesticide residue in green leafy vegetables: A comprehensive review

“…The use of pesticides to control pests is of enormous importance, both for reducing crop yield losses and improving food quality (Aktar, Sengupta, & Chowdhury, ; Cooper & Dobson, ; Fantke & Juraske, ). Advances in pesticide application have played an important role in increasing agricultural productivity because of the pesticides' significant potency and low economic costs (Lambropoulou, Sakkas, & Albanis, ; Olsson, Nguyen, Sadowski, & Barr, ; Seebunrueng, Santaladchaiyakit, Soisungnoen, & Srijaranai, ; Sun et al, ), thus endowing pesticides with agricultural and economic value (Patil, ). However, the health effects of gradual low‐level exposure to pesticides that may contaminate agricultural commodities are increasingly attracting attention (Fantke & Juraske, ; Slovic, ).…”

Dual cloud point extraction coupled with hydrodynamic-electrokinetic two-step injection followed by micellar electrokinetic chromatography for simultaneous determination of trace phenolic estrogens in water samples

“…A number of reports have concerned the use of the CPE approach as a means by which to extract and enrich inorganic, organic, and biological analytes prior to spectroscopic, chromatographic, or CE analysis [14][15][16][17][18][19][20]. In this work, dual CPE (dCPE) was firstly developed for extraction of PEEs from water samples.…”

A molecularly imprinted polymer based a lab-on-paper chemiluminescence device for the detection of dichlorvos

“…The reference method of HPLC was used here [33] in order to evaluate the accuracy of the proposed paper-based CL method. After spraying 2.0 mL different concentration of DDV standard solution on the cabbage leaves and tomato skin, 20 mL methanol was used to elute the DDV.…”