TY - JOUR
T1 - Sensitive amperometric titration of o-phenylenediamine employing catalytic electrode reaction end-point detection
AU - Kirowa-Eisner, E.
AU - Mark, Harry B.
N1 - Funding Information:
This research was supported in part by grants from the National Science Foundation (NSF GP-462o and GP-6425) and the U.S. Army Research Office-Darham (contract No. DA 3II24 ARO-D284).
PY - 1968/3
Y1 - 1968/3
N2 - The catalytic prewave of the Ni-opda system has been used for a sensitive amperometric detection of the end-point of the opda titration. Au(III) was chosen as titrant from a large group of possible oxidants, because of its favourable equilibrium and kinetic properties. Three end-points are observed in the titration and the reactions involved were shown to be as follows: {A figure is presented} {A figure is presented}. The limiting sensitivity for the determination of opda was found to be 1·10-6 M, with a standard deviation of 4.6%. The titration of opda was not feasible in the presence of the other phenylenediamines. The catalytic electrode reactions involving cyclic regeneration of the redox species, are applicable for end-point detection systems for the amperometric titrations of trace concentration of these species, provided titrants can be found that have suitable thermodynamic and kinetic properties in their reaction with the redox species.
AB - The catalytic prewave of the Ni-opda system has been used for a sensitive amperometric detection of the end-point of the opda titration. Au(III) was chosen as titrant from a large group of possible oxidants, because of its favourable equilibrium and kinetic properties. Three end-points are observed in the titration and the reactions involved were shown to be as follows: {A figure is presented} {A figure is presented}. The limiting sensitivity for the determination of opda was found to be 1·10-6 M, with a standard deviation of 4.6%. The titration of opda was not feasible in the presence of the other phenylenediamines. The catalytic electrode reactions involving cyclic regeneration of the redox species, are applicable for end-point detection systems for the amperometric titrations of trace concentration of these species, provided titrants can be found that have suitable thermodynamic and kinetic properties in their reaction with the redox species.
UR - http://www.scopus.com/inward/record.url?scp=49949123473&partnerID=8YFLogxK
U2 - 10.1016/S0022-0728(68)80087-7
DO - 10.1016/S0022-0728(68)80087-7
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AN - SCOPUS:49949123473
SN - 0022-0728
VL - 16
SP - 397
EP - 404
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 3
ER -