Anodic stripping voltammetric determination of bismuth (Ⅲ) with 1-(2-pyridylazo)-2-naphthol modified carbon ionic liquid electrode
In this paper 1-(2-pyridylazo)-2-naphthol (PAN) and ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) were mixed with graphite powder to get a modified carbon paste electrode (PAN-1L-CPE), which was further used for the sensitive determination of bismuth(Ⅲ). By the co-contribution of the formation of PAN-Bi complex and the accumulation effect of IL, more bismuth(Ⅲ) was electrodeposited on the surface of the PAN-IL-CPE. Then the reduced Bi was oxidized and detected by differential pulse anodic stripping voltammetry (DPASV) with the oxidation peak appeared at 0.17 V (vs. SCE). Under the optimal conditions the oxidation peak current was proportional to the bismuth(Ⅲ) concentration in the range from 0.04 to 7.5 μM with the detection limit as 3.9 nM. The proposed method was successfully applied to the stomach medicine sample detection with good recovery.
Bismuth(Ⅲ) Differential pulse anodic stripping voltammetry 1-Ethyl-3-methylimidazolium tetrafluoroborate 1-(2-Pyridylazo)-2-naphthol Chemical modified electrode
Mangxia Wang Zhigang Jiang Shuai Zhang Jun Liu Hejian Liu Wei Sun
Shandong Entry-Exit Inspection and Quarantine Bureau of People”s Republic of China, Qingdao 266002, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingda
国内会议
青岛
英文
368-372
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）