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Sensitive Voltammetric Determination of Methyl Parathion Using a Carbon Paste Electrode Modified with Mesoporous Zirconia
Author(s) -
Tan Xiaohong,
Li Buhai,
Zhan Guoqing,
Li Chunya
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200900270
Subject(s) - cubic zirconia , detection limit , electrode , mesoporous material , redox , electrochemistry , materials science , carbon fibers , parathion methyl , linear range , nuclear chemistry , chemical engineering , chemistry , inorganic chemistry , catalysis , chromatography , composite material , organic chemistry , composite number , ceramic , pesticide , agronomy , biology , engineering
A mesoporous zirconia modified carbon paste electrode was developed for electrochemical investigations of methyl parathion (MP, Phen‐NO 2 ). The significant increase of the peak currents and the improvement of the redox peak potential indicate that mesoporous zirconia facilitates the electronic transfer of MP. The oxidation peak current was proportional to the MP concentration in the range from 1.0×10 −8 to 1.0×10 −5 mol L −1 with a detection limit of 4.6×10 −9 mol L −1 ( S / N =3) after accumulation under open‐circuit for 210 s. The proposed method was successfully applied to the determination of MP in apple samples.