Premium
Electrocatalytic amperometric detection of hydroxylamine with a palladium‐modified carbon paste electrode
Author(s) -
Cai Xiaohua,
Kalcher Kurt,
Lintschinger Josef,
Neuhold Christian G.,
Tykarski Janusz,
Ogorevc Bozidar
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070609
Subject(s) - hydroxylamine , amperometry , detection limit , palladium , carbon paste electrode , electrode , chemistry , inorganic chemistry , analyte , electrochemistry , nuclear chemistry , chromatography , cyclic voltammetry , catalysis , organic chemistry
Carbon paste electrodes (CPEs), modified by addition of Pd powder to the paste and electroactivation, exhibited electrocatalytic activity towards hydroxylamine. Electrogenerated palladium(0) at the electrode surface was found to be involved in the electrocatalytic oxidation of NH 2 OH. The electrode was employed as an amperometric detector for flow injection systems. Repeated injections (60) of hydroxylamine (5 ng) showed a relative standard deviation of 4.0%. Linear relation between the current and the analyte concentration was found between 0.1 and 10 ng of hydroxylamine. The detection limit was 20pg NH 2 OH (3σ). The applicability of the method to the determination of hydroxylamine in river water was investigated.