Citation: A. Benvidi, M.T. Ghanbarzadeh, M. Dehghan, M. Mazloum-Ardakani, R. Vafazadeh. Thiocyanate ion selective electrode based on bis(N-3-methylphenyl salicylidenaminato)copper(Ⅱ) ionophore[J]. Chinese Chemical Letters, ;2014, 25(12): 1639-1642. doi: 10.1016/j.cclet.2014.06.020 shu

Thiocyanate ion selective electrode based on bis(N-3-methylphenyl salicylidenaminato)copper(Ⅱ) ionophore

1.
Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran

Corresponding author: A. Benvidi,
Received Date: 28 February 2014
Available Online: 6 June 2014

In this work a PVC membrane electrode based on bis(N-3-methyl phenyl salicylidenaminato)copper(Ⅱ) as ionophore was prepared. The electrode was tested by inorganic anions and showed good selectivity for thiocyanate ion. This sensor showed Nerstian behavior with a slope of a 59.3 mV per decade at 25 ℃. The proposed electrode exhibited a wide linear range from 1.0×10^-6 mol/L to 1.0×10^-1 mol/L with a detection limit of 5.0×10^-7 mol/L. The electrode response was independent of pH in the range of 4.0-10.0. The response time is about 9-21 s, and the electrode can be used for over 60 days without considerable deterioration. The prepared sensor was applied as an indicator electrode in potentiometric titration of SCN^- with Ag⁺ ion and to determine the thiocyanate in samples of urine and saliva.
- Thiocyanate,
- PVC membrane electrode,
- Potentiometric determination,
- Ionophore
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沈阳化工大学材料科学与工程学院沈阳 110142