title: An electrochemical fungicide pyrimethanil sensor based on carbon nanotubes/ionic-liquid construction modified electrode.
abstract: In this study, a simple, rapid, sensitive and environmentally friendly electroanalytical detection method for pyrimethanil (PMT) was developed, which was based on multi-walled carbon nanotubes (MWCNTs) and ionic liquids (IL) 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) modified glassy carbon electrode (GCE). MWCNTs-IL modified electrode significantly enhanced the oxidation peak current of PMT by combining the excellent electrochemical properties of MWCNTs and IL, suggesting that the modified electrode can remarkably improve the sensitivity of PMT detection. Under the optimum conditions, this electrochemical sensor exhibited a linear concentration range for PMT of 1.0 × 10(-7)-1.0 × 10(-4) mol L(-1) and the detection limit was 1.6 × 10(-8) mol L(-1) (S/N = 3). The fabricated electrode showed good reproducibility, stability and anti-interference, and also it was successfully employed to detect PMT in real samples.
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China.
authors.forename: Jichun
authors.initials: J
authors.lastname: Yang
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China.
authors.forename: Minhui
authors.initials: M
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China.
authors.forename: Shuming
authors.initials: S
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China. Electronic address: zhanglei63@126.com.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
mesh_terms: D004566:Electrodes; D005504:Food Analysis / Q000295:instrumentation* / Q000379:methods; D005513:Food Inspection / Q000379:methods; D005659:Fungicides, Industrial / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry; D057230:Limit of Detection; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D011743:Pyrimidines / Q000032:analysis*; D015203:Reproducibility of Results
chemical_list: C412621:1-butyl-3-methylimidazolium hexafluorophosphate; D005659:Fungicides, Industrial; D007093:Imidazoles; D052578:Ionic Liquids; D037742:Nanotubes, Carbon; D011743:Pyrimidines; C108337:pyrimethanil
keywords: Electrochemical determination; Ionic liquids; Modified electrode; Multi-walled carbon nanotubes; Pyrimethanil