title: Highly selective oxalate-membrane electrode based on 2,2'-[1,4-butandiyle bis(nitrilo propylidine)]bis-1-naphtholato copper(II).
abstract: A new oxalate-selective electrode based on the complex 2,2'-[1,4-butandiyle bis(nitrilo propylidine)]bis-1-naphtholato copper(II) (CuL) as the membrane carrier was developed. The electrode exhibited a good Nernstian slope of -29.2+/-0.6 mV/decade (mean value+/-standard deviation, n=5) and a linear range of 5.0 x 10(-8) to 1.0 x 10(-1)M for oxalate. The limit of detection was 5.0 x 10(-8)M. This electrode represents a fast response time (i.e. 10-15s) and could be used for more than 3 months. The selectivity coefficients were determined by the fixed interference method (FIM) and could be used in the pH range of 2.0-7.0. It was employed as an indicator electrode for the determination of oxalate in water samples.
authors.affiliation: Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran. mazloum@yazduni.ac.ir
authors.forename: M Mazloum
authors.initials: MM
authors.lastname: Ardakani
authors.forename: M
authors.initials: M
authors.lastname: Jalayer
authors.forename: H
authors.initials: H
authors.lastname: Naeimi
authors.forename: A
authors.initials: A
authors.lastname: Heidarnezhad
authors.forename: H R
authors.initials: HR
authors.lastname: Zare
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D008839:Microelectrodes; D009942:Organometallic Compounds / Q000737:chemistry*; D010070:Oxalates / Q000032:analysis* / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014867:Water / Q000032:analysis* / Q000737:chemistry*
chemical_list: C508664:2,2'-(1,4-butandiyle bis(nitrilo propylidine))bis-1-naphtholato copper(II); D008567:Membranes, Artificial; D009942:Organometallic Compounds; D010070:Oxalates; D014867:Water