|
|||||
|
|
Development of a new fluorimetric bulk optode membrane based on 2,5-thiophenylbis(5-tert-butyl-1,3-benzexazole) for nickel(II) ions |
|
| Authors: | Mojtaba Shamsipur Tahereh Poursaberi Morteza Hosseini Naader Alizadeh Mohammad Reza Ganjali |
| Institution: | a Department of Chemistry, Razi University, Kermanshah, Iran b Department of Chemistry, Tarbiat Modarres University, Tehran, Iran c Department of Chemistry, Tehran University, Tehran, Iran |
| Abstract: | A highly sensitive and selective fluorimetric optode membrane for the determination of ultra trace amounts of Ni2+ ions was prepared. The plasticized PVC-membrane incorporating potassium tetrakis(p-chlorophenyl)borate (KTpClPB) and 2,5-thiophenylbis(5-tert-butyl-1,3-benzexazole) (TTBB), as a highly fluorescent chromoionophore, displays a calibration response for Ni2+ ions over a wide concentration range of 1.0×10−3 to 1.0×10−8 M. It has a relatively fast response of <40 s. In addition to high stability and reproducibility, and relatively long working lifetime, the sensor possesses good selectivity for nickel ions over several common diverse ions. The fluorescence signal of the optode membrane can be easily recovered by immersion in EDTA solution. The optode was applied successfully to the determination of traces of Ni2+ ion in edible oil and a wastewater sample from nickel electroplating industries. |
| Keywords: | Optode membrane Nickel(II) Fluorescence quenching 2 5-Thiophenylbis (5-tert-butyl-1 3-benzexazole) |
| 本文献已被 ScienceDirect 等数据库收录！ | |