title: Construction and performance characteristics of new fentanyl-selective plastic membrane electrode.
abstract: The construction and performance characteristics of an ion-selective electrode for fentanyl-drug cation, based on an ion-pair complex with tetrakis[3,5-bis-(trifluoromethyl)phenyl]borate anion in a PVC matrix were studied. A linear response for 1 x 10(-5) mol dm-3 to 1 x 10(-2) mol dm-3 drug with a slope of 57.9 +/- 0.5 mV/decade was established. The optimum pH range was 2 to 6. The lower detection limit was 6.29 x 10(-6) mol dm-3 fentanyl citrate (2.1165 micrograms cm-3 fentanyl). There were negligible interferences from a number of inorganic cations, structural analogues, and some common drug additives in injections. The electrode proposed has been successfully applied to determine fentanyl citrate in injections. The results correlated well with those obtained by the United States Pharmacopoeia standard procedure.
authors.affiliation: Department of Chemistry, Yunnan University, Kunming, Yunnan 650091, PR China.
authors.forename: L J
authors.initials: LJ
authors.lastname: Peng
authors.forename: M L
authors.initials: ML
authors.lastname: Wen
authors.forename: Y
authors.initials: Y
authors.lastname: Yao
mesh_terms: D002624:Chemistry, Clinical / Q000295:instrumentation / Q000379:methods; D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry; D004566:Electrodes; D005283:Fentanyl / Q000737:chemistry* / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D010795:Phthalic Acids / Q000737:chemistry; D011199:Potentiometry
chemical_list: D010795:Phthalic Acids; C032279:phthalic acid; D005283:Fentanyl