A novel amperometric sensor and chromatographic detector for determination of parathion |
| |
Authors: | Chunya?Li Changfa?Wang Yong?Ma Wei?Bao Email author" target="_blank">Shengshui?HuEmail author |
| |
Institution: | (1) Department of Chemistry, Wuhan University, Wuhan, 430072, P.R. China |
| |
Abstract: | A novel amperometric sensor and chromatographic detector for determination of parathion has been fabricated from a multi-wall carbon nano-tube (MWCNT)/Nafion film-modified glassy-carbon electrode (GCE). The electrochemical response to parathion at the MWCNT/Nafion film electrode was investigated by cyclic voltammetry and linear sweep voltammetry. The redox current of parathion at the MWCNT/Nafion film electrode was significantly higher than that at the bare GCE, the MWCNT-modified GCE, and the Nafion-modified GCE. The results indicated that the MWCNT/Nafion film had an efficient electrocatalytic effect on the electrochemical response to parathion. The peak current was proportional to the concentration of parathion in the range 5.0×10–9–2.0×10–5 mol L–1. The detection limit was 1.0×10–9 mol L–1 (after 120 s accumulation). In high-performance liquid chromatography with electrochemical detection (HPLC–ED) a stable and sensitive current response was obtained for parathion at the MWCNT/Nafion film electrode. The linear range for parathion was over four orders of magnitude and the detection limit was 6.0×10–9 mol L–1. Application of the method for determination of parathion in rice was satisfactory. |
| |
Keywords: | Carbon nano-tube Nafion Sensor Parathion High-performance liquid chromatography |
本文献已被 PubMed SpringerLink 等数据库收录! |