Optimization and validation of a new pesticide residue method for cucumber and tomato using acetonitrile-based extraction-dispersive liquid–liquid microextraction followed by liquid chromatography-tandem mass spectrometry

Dashtbozorgi, Zahra; Ramezani, Mohammad Kazem; Waqif-Husain, Syed

doi:10.1039/c2ay26287h

Cited by 20 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The figures of merit of the developed MSPME combined with HPLC method were compared with recently published literature for the extraction and determination of diazinon and malathion (Table ) by chromatographic method. As it is observed, the proposed method exhibits higher preconcentration factors compared to the other extraction methods so that its detection limit is even lower than separation methods combined with more sensitive and expensive instrument such as GC–MS or HPLC–MS/MS . The precision and the linear dynamic range of the method is also comparable to the previously reported methods.…”

Section: Resultssupporting

confidence: 58%

“…However, due to the very low concentration of OPPs in environmental samples as well as the matrices interferences, their direct determination by chromatographic methods, such as HPLC and GC, is not possible and a separation/preconcentration step is often necessary. Several pretreatment methods including cloud point extraction [5], dispersive liquid–liquid microextraction , headspace solid‐phase microextraction , SPE , and SPME have been reported for the separation, enrichment, and sample cleanup of the OPPs residue in various matrices. SPE and SPME are the most extensively used sample pretreatment method with the advantages of short extraction time, safety, low consumption of organic solvent, simplicity, and possibility of achieving high enrichment factor .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Bazmandegan‐Shamili

Shabani

Dadfarnia

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

A novel magnetic mesoporous silica material was synthesized and used as the sorbent for the magnetic solid-phase microextraction of diazinon and malathion before their quantification by high-performance liquid chromatography with UV detection. The sorbent was synthesized by a surfactant-templated one-pot sol-gel procedure using SiO -coated Fe O as the magnetic support, cetyltrimethylammonium bromide as the template and tetraethyl orthosilicate as the silicon source. The characteristics of the prepared sorbent were investigated using Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The sorbent exhibited a high maximum adsorption capacity of 19.2 and 9.4 mg/g for diazinon and malathion, respectively. The parameters affecting the microextraction were optimized by the MultiSimplex method. Under the optimized conditions, the calibration graphs were linear in the concentration ranges of 0.3-50.0 and 0.5-50 μg/L with the limits of detection of 0.09 and 0.14 μg/L for diazinon and malathion, respectively. The relative standard deviations (n = 5) at a concentration level of 10.0 μg/L of analytes were less than 2.5 and 4% for intra and interday, respectively. The developed method was successfully used for the determination of diazinon and malathion in apple, tomato, cucumber, tap water, and well water samples.

show abstract

Section: Resultssupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Bazmandegan‐Shamili

Shabani

Dadfarnia

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

show abstract

“…Analytical standard metalaxyl (99% purity) was purchased from Sigma‐Aldrich (Steinheim, Germany). Selected properties of metalaxyl are given in Table . Solvents (liquid chromatography grade), including acetonitrile (ACN), formic acid (FA) and glacial acetic acid (AC), were purchased from Merck (Darmstadt, Germany).…”

Section: Methodsmentioning

confidence: 99%

“…Selected properties of metalaxyl are given in Table 1. 18 Solvents (liquid chromatography grade), including acetonitrile (ACN), formic acid (FA) and glacial acetic acid (AC), were purchased from Merck (Darmstadt, Germany). Anhydrous magnesium sulphate and primary-secondary amine (PSA) were provided by Agilent Technology.…”

Section: Chemicals Reagents and Apparatusmentioning

confidence: 99%

Dissipation behaviour, processing factors and risk assessment for metalaxyl in greenhouse‐grown cucumber

Ramezani

Shahriari

2014

Pest Management Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Comparison between the proposed method and some other reported techniques for determination of diazinon, malathion, and chlorpyrifos was performed, and the results obtained are provided in Table .…”

Section: Resultsmentioning

confidence: 99%

Microfunnel‐filter‐based emulsification microextraction followed by gas chromatography for simple determination of organophosphorus pesticides in environmental water samples

Talaee

Lorestani

Ramezani

et al. 2019

J of Separation Science

View full text Add to dashboard Cite

A simple and fast method named microfunnel-filter-based emulsification microextraction is introduced for an efficient determination of some organophosphorus pesticides including diazinon, malathion, and chlorpyrifos in the environmental samples including the river, sea, and well water. This method is based upon the dispersion of a low-toxicity organic solvent (dihexyl ether), as the extractant, in a high volume of an aqueous sample solution (45 mL). It is implemented without a centrifugation step, and using a syringe filter and a micro-funnel, the phase separation and transfer of the enriched analytes to the gas chromatograph are simply achieved. By filtration of the extractant phase, a suitable sample clean-up is obtained, and the total extraction time is just a few minutes. The factors influencing the extraction efficiency are optimized, and under the optimal conditions, the proposed method provides a good linearity (in the range of 15-1500 ng/mL (R 2 > 0.996). A high enrichment factor is obtained (in the range of 306-342), and the method provides low limits of detection and quantification (in the ranges of 4-8 and 15-25 ng/mL, respectively). K E Y W O R D Scentrifugeless method, environmental water samples, microextraction, microfunnel-filtration-based method, organophosphorus pesticides 2418

show abstract

Optimization and validation of a new pesticide residue method for cucumber and tomato using acetonitrile-based extraction-dispersive liquid–liquid microextraction followed by liquid chromatography-tandem mass spectrometry

Cited by 20 publications

References 16 publications

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Dissipation behaviour, processing factors and risk assessment for metalaxyl in greenhouse‐grown cucumber

Microfunnel‐filter‐based emulsification microextraction followed by gas chromatography for simple determination of organophosphorus pesticides in environmental water samples

Contact Info

Product

Resources

About