Perchlorate-selective polymeric membrane electrode based on bis(dibenzoylmethanato)cobalt(II) complex as a neutral carrier.
A synthesized bis(dibenzoylmethanato)Co(II) complex (Co(DBM)(2)), has been used as a ionophore for the preparation of a new perchlorate ion-selective electrode. The electrode exhibits a Nernstian response over the perchlorate concentration range of 8.0x10(-7)-1.0x10(-1)M with a slope of 60.3+/-0.5 mV per decade of concentration. The limit of detection as determined from the intersection of the extrapolated linear segments of the calibration plot is 5.6x10(-7)M. The electrode shows good selectivity towards perchlorate with respect to many common anions. The response time of the sensor is very fast (< or = 5s), and can be used for at least 2 months in the pH range of 2.0-9.0. The electrode was used to determine perchlorate in water and human urine. The interaction of the ionophore with perchlorate ions was demonstrated by UV-vis spectroscopy.
Rezaei
Behzad
B
Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran. rezaei@cc.iut.ac.ir
Meghdadi
Soraia
S
Bagherpour
Saeid
S
D000838:Anions; D002138:Calibration; D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008956:Models, Chemical; D010472:Perchlorates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011199:Potentiometry / Q000379:methods; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D016482:Urinalysis / Q000379:methods; D014867:Water / Q000737:chemistry; D018508:Water Purification
D000838:Anions; D007477:Ions; D010472:Perchlorates; D011108:Polymers; D014867:Water; D003035:Cobalt; C494474:perchlorate