Optimization of a single-drop microextraction procedure for the determination of organophosphorus pesticides in water and fruit juice with gas chromatography-flame photometric detection

Organophosphorus Pesticides Analysis

“…Other methods aimed to ensure a high sensitivity of the determination, in concert with the reliable sample preparation technique, apart of the mentioned above, are: gas chromatography with nitrogen-phosphorus detection (Fenoll et al, 2007;Georgakopoulos et al, 2009;Pagliuca et al, 2005;Ravelo-Pérez et al, 2008), gas chromatography with flame thermionic detection (Tsoutsi et al, 2006), gas chromatography with electron capture detection (Chai & Tan, 2009;Guardia-Rubio et al, 2007;Ibrahim et al, 2010;Pinho et al, www.intechopen.com 2010; Ramos et al, 2009), gas chromatography with flame photometric detection (Ahmadi et al, 2006;Wang & Du, 2010;Xiao et al, 2006;Zhao et al, 2011), gas chromatography with flame ionization detection (Pinheiro, & Andrade, 2009), liquid chromatography with electrochemical flow detection (Trojanowicz, 2010), liquid chromatography with UV detection (Buonasera et al, 2009), high performance liquid chromatography with UV detection (Zhu et al, 2007), high performance liquid chromatography with fluorimetric detection (Pérez-Ruiz et al, 2005), and high performance liquid chromatography with diode array detection (Wu et al, 2010). Relevant data collected for the period 2010-2011, revealing the analytical performances of some selected chromatographic methods are summarized in Table 3.…”

Preconcentration and Determination of Organophosphorus Pesticides in Water Samples by Graphene Oxide Nanoparticles Reinforced Hollow Fiber Solid/liquid Phase Microextraction and Gas Chromatography-flame Ionization Detector

“…Anyway, higher concentrations of salt curb extraction of the OPs. The presence of higher concentrations of salt change the physical properties of the extraction film and thus diminish the diffusion rates of the OPs into the organic and graphene phase 29,30 . The pH value of aqueous phase plays a fundamental role in the microextraction.…”

Current Trends in Liquid-Liquid Microextraction for Analysis of Pesticide Residues in Food and Water

“…Direct SDME has extensively been used for the direct extraction of pesticide residues from aqueous samples (Table 1). Xiao et al (2006) evaluated two types of SDME, static and dynamic, in extraction of six organophosphorus pesticides (OPPs) (dichlorvos, phorate, fenitrothion, malathion, parathion, quinalphos) from water and fruit juice. Significant parameters affecting SDME performance such as extractant solvent, solvent volume, stirring rate, sample pH and ionic strenght were evaluated.…”