Solid-state PVC flow-through benzoate electrode.
A general construction procedure for conventional shape ion-selective electrodes based on a conductive support prepared with a mixture of a non-conductive epoxy and graphite was used in the preparation of a flow-through benzoate electrode to be used as potentiometric detector in flow injection analysis manifolds. The membranes were prepared from tetraoctylammonium benzoate in o-nitrophenyloctylether immobilized on PVC. The results of the assessment of the tubular electrodes behaviour in low dispersion manifolds against that of conventional electrodes with the same membrane are reported. Data obtained with a double-channel flow injection manifold incorporating these tubular detectors for benzoate determinations in several commercially available pharmaceutical preparations are also presented.
Lima
J L
JL
Physical Chemistry Department, Faculty of Pharmacy, Porto, Portugal.
Conceição
M
M
Montenegro
B S
BS
Alonso
J
J
Bartroli
J
J
Raurich
J G
JG
D001565:Benzoates / Q000032:analysis / Q000737:chemistry*; D004355:Drug Stability; D004563:Electrochemistry; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D011143:Polyvinyl Chloride / Q000032:analysis*; D011199:Potentiometry; D012996:Solutions / Q000032:analysis
D001565:Benzoates; D007202:Indicators and Reagents; D012996:Solutions; D011143:Polyvinyl Chloride