Novel PVC-based copper(II) membrane sensor based on 2-(1'-(4'-(1''-hydroxy-2''-naphthyl)methyleneamino)butyl iminomethyl)-1-naphthol.
A copper(II) ion-selective PVC membrane sensor based on 2-(1'-(4'-(1''-hydroxy-2''-naphthyl)methyleneamino)butyl iminomethyl)-1-naphthol (BHNB) as a novel Schiff base containing a sensing material has been successfully developed. The sensor exhibits a good linear response of 29 mV per decade within the concentration range of 10(-1)-10(-6) M of Cu2+. The sensor shows good selectivity for copper(II) ion in comparison with alkali, alkaline earth, transition and heavy metal ions. The BHNB-based sensor is suitable for use with aqueous solutions of pH 3.5-7.0 and displays minimal interference by Sr(II), Cd(II), Hg(II), Zn(II) and Pb(II), which are known to interfere with other previously suggested electrodes. The proposed membrane electrode was used as a sensor for determining the Cu(II) content in black tea samples. It was also applied as an indicator electrode in the potentiometric titration of Cu2+ ions with EDTA.
Ganjali
Mohammad Reza
MR
Department of Chemistry, Tehran University, Tehran, Iran. Ganjali@Khayam.ac.ir
Golmohammadi
Mahmood
M
Yousefi
Mohammad
M
Norouzi
Parviz
P
Salavati-Niasari
Masoud
M
Javanbakht
Mehran
M
D003300:Copper / Q000032:analysis*; D004492:Edetic Acid; D007097:Imines / Q000737:chemistry*; D017736:Ion-Selective Electrodes / Q000592:standards*; D009284:Naphthols / Q000737:chemistry*; D011143:Polyvinyl Chloride; D012545:Schiff Bases; D012680:Sensitivity and Specificity; D013662:Tea / Q000737:chemistry; D014873:Water Pollutants / Q000032:analysis*
C475891:2-(1'-(4'-(1''-hydroxy-2'-naphthyl)methyleneamino)butyliminiomethyl)-1-naphthol; D007097:Imines; D009284:Naphthols; D012545:Schiff Bases; D013662:Tea; D014873:Water Pollutants; D003300:Copper; D011143:Polyvinyl Chloride; D004492:Edetic Acid