Cobalt(II)-selective membrane electrode based on a recently synthesized benzo-substituted macrocyclic diamide.
A PVC-membrane electrode based on a recently synthesized 18-membered macrocyclic diamide is presented. The electrode reveals a Nernstian potentiometric response for Co2+ over a wide concentration range (2.0 x 10(-6)-1.0 x 10(-2) M). The electrode has a response time of about 10 s and can be used for at least 2 months without any divergence. The proposed sensor revealed very good selectivities for Co2+ over a wide variety of other metal ions, and could be used over a wide pH range (3.0-8.0). The detection limit of the sensor is 6.0 x 10(-7) M. It was successfully applied to the direct determination and potentiometric titration of cobalt ion.
Shamsipur
M
M
Department of Chemistry, Razi University, Kermanshah, Iran.
Poursaberi
T
T
Rouhani
S
S
Niknam
K
K
Sharghi
H
H
Ganjali
M R
MR
D000577:Amides / Q000737:chemistry; D003035:Cobalt / Q000032:analysis*; D004566:Electrodes; D055590:Electromagnetic Phenomena; D007202:Indicators and Reagents; D007476:Ionophores; D008567:Membranes, Artificial; D011083:Polycyclic Compounds / Q000032:analysis*
D000577:Amides; D007202:Indicators and Reagents; D007476:Ionophores; D008567:Membranes, Artificial; D011083:Polycyclic Compounds; D003035:Cobalt