Two-dimensional coordination polymer matrix for solid-phase extraction of pesticide residues from plant Cordia salicifolia

✍ Scribed by Pedro Henrique Viana de Carvalho; Alysson Santos Barreto; Marcelo O. Rodrigues; Vanessa de Menezes Prata; Péricles Barreto Alves; Maria Eliane de Mesquita; Severino Alves Júnior; Sandro Navickiene

• Book ID: 102926158
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 522 KB
• Volume: 32
• Category: Article
• ISSN: 1615-9306
• DOI: 10.1002/jssc.200900076

✦ Synopsis

Abstract

The 2D coordination polymer (~∞~[Gd(DPA)(HDPA)]) was tested for extraction of acephate, chlorpropham, pirimicarb, bifenthrin, tetradifon, and phosalone from the medicinal plant Cordia salicifolia, whose extracts are commercialized in Brazil as diuretic, appetite suppressant, and weight loss products, using GC/MS, SIM. Considering that there are no Brazilian regulations concerning maximum permissible pesticide residue concentrations in medicinal herbs, recovery experiments were carried out (seven replicates), at two arbitrary fortification levels (0.5 and 1.0 mg/kg), resulting in recoveries in range of 20 to 107.7% and SDRSDs were between 5.6 and 29.1% for ~∞~[Gd(DPA)(HDPA)] sorbent. Detection and quantification limits for herb ranged from 0.10 to 0.15 mg/kg and from 0.15 to 0.25 mg/kg, respectively, for the different pesticides studied. The developed method is linear over the range assayed, 0.5–10.0 μg/mL, with correlation coefficients ranging from 0.9975 to 0.9986 for all pesticides. Comparison between ~∞~[Gd(DPA)(HDPA)] sorbent and conventional sorbent (neutral alumina) showed similar performance of ~∞~[Gd(DPA)(HDPA)] polymeric sorbent for three (bifenthrin, tetradifon, and phosalone) out of six pesticides tested.