Premium
Carbon Black‐Modified Electrodes as Sensitive Tools for the Electrochemical Detection of Nitrite and Nitrate
Author(s) -
Malha Seif Islam Rabie,
Mandli Jihane,
Ourari Ali,
Amine Aziz
Publication year - 2013
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.201300257
Subject(s) - nitrite , amperometry , detection limit , nitrate , carbon black , electrode , electrochemistry , chemistry , carbon fibers , inorganic chemistry , carbon paste electrode , dispersion (optics) , materials science , cyclic voltammetry , chromatography , organic chemistry , composite number , composite material , natural rubber , physics , optics
Both screen‐printed electrodes modified with a dispersion of carbon black (CB) and solid paste electrodes prepared using a nanostructured CB were developed and characterized. Indeed, increasing the peak currents and/or their shifting to negative potentials were observed, exhibiting efficient electrocatalytic activity towards nitrite oxidation with high sensitivity and low detection limit. Solid carbon paste electrodes (SCPEs) and solid carbon black paste electrodes (SCBPEs) were challenged in amperometric mode with nitrite since detection limit reached is 65 and 5 nM respectively. Nitrate was first reduced to nitrite in reductor column, then detected on SCBPEs. Nitrate and nitrite were determined in real samples.