title: Hydrophobic coating of polyaniline-poly(propylene oxide) copolymer for direct immersion solid phase microextraction of carbamate pesticides.
abstract: A nanostructural polyaniline-poly(propylene oxide) (PANI-PPO) composite coating was electrochemically synthesized on a stainless steel wire, by using acidic ionic liquid 1-sulfobutyl-3-methylimidazolium hydrosulfate as supporting electrolyte. The coating showed strong hydrophobicity and allowed for the direct immersion solid-phase microextraction of carbamate pesticides (i.e. 2-(1-methylethoxy) phenyl methylcarbamate, m-tolyl-n-methylcarbamate, 2-(1-methylethyl) phenyl methylcarbamate, 2-(1-methylpropyl) phenol methylcarbamate and 2,3-dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate) in complex matrices. Moreover, this coating could be used for at least 120 times of extraction. When it was coupled with gas chromatography for the determination of these carbamate pesticides the linear ranges were about 0.1-100 μg L(-1) and the detection limits were 0.012-0.048 μg L(-1). It also displayed acceptable repeatability and reproducibility. When a fiber was used for five successive measurements the relative standard deviations (RSDs) were smaller than 8.7%, and the RSDs for fiber-to-fiber were 5.7-12.9% (n=5). The practical feasibility of the proposed method was evaluated by determining carbamate pesticides in vegetable samples and the recoveries for standards added were 79.8-108.8%.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Key Laboratory for the Synthesis and Application of Organic Functional Molecules (Ministry of Education), College of Chemistry & Chemical Engineering, Hubei University, Wuhan 430062, PR China.
authors.forename: Youhong
authors.initials: Y
authors.lastname: Ai
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China; College of Chemistry & Biology Engineering, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, PR China.
authors.forename: Jingqiang
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
authors.forename: Faqiong
authors.initials: F
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China. Electronic address: bzzeng@whu.edu.cn.
authors.forename: Baizhao
authors.initials: B
authors.lastname: Zeng
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D002219:Carbamates / Q000032:analysis*; D002849:Chromatography, Gas; D005504:Food Analysis / Q000295:instrumentation / Q000379:methods*; D049329:Nanostructures / Q000737:chemistry; D010575:Pesticides / Q000032:analysis*; D011108:Polymers / Q000032:analysis; D011409:Propylene Glycols / Q000032:analysis; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction; D013193:Stainless Steel / Q000737:chemistry
chemical_list: D000814:Aniline Compounds; D002219:Carbamates; D010575:Pesticides; D011108:Polymers; D011409:Propylene Glycols; C416807:polyaniline; D013193:Stainless Steel; C012504:polypropylene glycol
keywords: Acidic ionic liquid; Carbamate pesticides; Direct immersion solid-phase microextraction; Poly(propylene oxide); Polyaniline