PVC-membrane ion-selective bulk optode for Ag+ ion based on hexathia-18-crown-6 and 1,2-benzo-3-octadecanoylimino-7-diethylaminophenoxazine.
A silver-selective optode membrane incorporating hexathia-18-crown-6 for cation recognition and a lipophilic chromoionophore 1,2-benzo-3-octadecanoylimino-7-diethylaminophenoxazine for transduction has been prepared. The PVC membrane composition was optimized to result in the largest working concentration range. The response range of the proposed optode is 5.0 x 10(-9)-5.0 x 10(-5) mol L(-1) Ag(+) with a limit of detection of 1.0 x 10(-9) mol L(-1). The probe works well at pH 5.0 and revealed small ion interference and good selectivity, reproducibility and stability.
Shamsipur
Mojtaba
M
Department of Chemistry, Razi University, Kermanshah, Iran. mshamsipur@yahoo.com
Rouhani
Shohreh
S
Mohajeri
Ali
A
Ganjali
Mohammad Reza
MR