Clean-up of aqueous acetone vegetable extracts by solid-matrix partition for pyrethroid residue determination by gas chromatography—electron-capture detection

Study on the residue and degradation of fluorine-containing pesticides in Oolong tea by using gas chromatography–mass spectrometry

“…It was estimated that about 30e50% of total pesticides developed in the last decade are fluorine-containing pesticides (Manteau, Pazenok, Vors, & Leroux, 2010). As two major kinds of fluorine-containing pesticides, pyrethroids and benzoylurea pesticides are increasingly used to control a wide range of insect pests for many crops since they have some interesting properties such as effectiveness at low doses, low environmental persistence, easy biodegradation and low mammalian toxicity (Liu, Zhao, Zhang, Ma, & Liu, 2008;Muccio et al, 1997). Although fluorine-containing pesticides have relatively low mammalian toxicity, the residue of fluorinecontaining pesticides in plant may cause damage to human health through the concentration in the food chain.…”

“…Therefore, the study on the analytical method, the residue and the degradation characteristics of pyrethroids and benzoylurea pesticides in Oolong tea is of great significance. To date, a variety of analytical methods such as gas chromatography-based method and HPLC (high performance liquid chromatography)-based method have been developed for the determination of pyrethroids (Angerer & Ritter, 1997;Galera, Gil García, & Valverde, 2006;Lentza-Rizos, Avramides, & Visi, 2001;Muccio et al, 1997;Vázquez, Mughari, & Galera, 2008) and benzoylurea pesticides (Balinova, 1998;Valenzuela, Lorenzini, Redondo, & Font, 1999), and were widely used for various foods (Chu, Hu, & Yao, 2005;Nguyen, Lee, Lee, & Lee, 2010). However, there are few reports on the degradation characteristics of pyrethroid and benzoylurea pesticides in leaves of Oolong tea trees in the literature, although a few studies on the residue of some specific insecticides such as bifenthrin in other teas have been reported (Tewary et al, 2005).…”

Determination of pyrethroids in chicken egg samples: development and validation of a confirmatory analytical method by gas chromatography/mass spectrometry

“…Pyrethroids are highly effective, photostable insecticides widely used in the agriculture (Kinsella et al, 2009) and livestock farming (Di Muccio et al, 1997;Zawiyah et al, 2007). Although they have been assessed as posing low risk to the environment (Kidd & James, 1991), pyrethroids have also been identified as potential endocrine disrupters (El-Gohary et al, 1999;Go et al, 1999;Vinggaard et al, 2000;Sun et al, 2003Sun et al, , 2005Gr€ unfeld & Bonefeld-Jorgensen, 2004).…”

Effectiveness of Selected Reaction Monitoring for rapid assay of Cypermethrin Residue in Perilla Leaves

“…Conventional methods are complicated and time consuming, because the sample matrixes extracted from agricultural products are usually very complex [3]. For example, methods using a gas chromatography/low resolving power mass spectrometry (GC/LRMS) or a GC with an electron capture detector (GC-ECD) need pretreatments such as gel permeation chromatography (GPC) or column chromatography to remove matrix interferences [4][5][6][7][8][9]. A simpler method without the time consuming clean-up and purification procedures is needed for routine analysis.…”