Multiresidue analysis of pesticides in olive oil by gel permeation chromatography followed by gas chromatography–tandem mass-spectrometric determination

Large-scale pesticide testing in olives by liquid chromatography–electrospray tandem mass spectrometry using two sample preparation methods based on matrix solid-phase dispersion and QuEChERS

“…Many approaches are being carried out in order to solve this challenge, as several reviews published recently demonstrate [6,7]. The proposed approaches usually rely on liquid-liquid partitioning with acetonitrile followed by solid-phase extraction (SPE)-based clean-up [8][9][10] (amongst them QuEChERS [8]), gel permeation chromatography (GPC) [11][12][13][14] or matrix solid-phase dispersion (MSPD) [15][16][17][18]. This sample treatment scheme is combined with hyphenated chromatographic-mass spectrometric techniques.…”

Simultaneous analysis of herbicides pendimethalin, oxyfluorfen, imazethapyr and quizalofop-p-ethyl by LC–MS/MS and safety evaluation of their harvest time residues in peanut (Arachis hypogaea L.)

“…Although that SPE considered as the technique of choice in many laboratories for fatty matrix, require additional establishment set-up and consumables that increased the whole operational cost and difficult to be used with nut samples because any sample should be in a homogeneous liquid state before addition to an SPE column or disk device. Special instrumentation is also required for GPC while several pre-treatment steps are typically required on bench (Sanchez et al, 2006;Wang et al 2009). Matrix solid phase dispersion (MSPD) offers high sensitivity only if exhaustive extraction is applied (Maldaner et al 2008).…”

Photocatalytic degradation kinetics and mechanism of antivirus drug-lamivudine in TiO2 dispersion

“…Methods analyzing PHHs in fish feeds usually involve extraction, removal of co-extracted lipids and/or other interference and selective determination by gas chromatography (GC) [16,17]. Although previous studies have reported detection of PHHs in fish feeds [16,17], and various analytical methods have been developed to analyze PHHs in fish tissue or oils [27][28][29][30][31][32][33], few studies have addressed the influence of lipid source and composition on performance of analytical procedures of PHHs in fish feeds.…”