Title
Amperometric carbon fiber nitrite microsensor for in situ biofilm monitoring
Abbreviated Journal Title
Public Perform. Manag. Rev.
Keywords
Biofilm; Carbon fiber; In situ monitoring; Microsensor; Nitrification; Nitrite; ELECTROCHEMICAL DETERMINATION; NITRIFYING BIOFILMS; ELECTRODE; MICROELECTRODE; OXIDATION; NITRATE; SURFACE; ION; VOLTAMMETRY; REDUCTION; Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
Abstract
A highly selective needle type solid state amperometric nitrite microsensor based on direct nitrite oxidation on carbon fiber was developed using a simplified fabrication method. The microsensor's tip diameter was approximately 7 mu m (14 mu m spatial resolution). At an applied potential of +1.2 V vs. Ag/AgCl, the microsensor exhibited a linear nitrite response from 0 to 25 mg N L-1, a 0.02 mg N L-1(1.3 mu M) limit of detection, and a fast response ( < 5 s). There was minimal interference with less than 3% of electrode response changes from major chemicals of interest in drinking water and wastewater systems [oxygen, ammonium, monochloramine, nitrate, sodium bicarbonate (alkalinity), chloride, sulfate, and acetate]. Hydrogen ion (pH) affected nitrite measurement by shifting the baseline response, translating into an approximate change of 0.24 mg N L-1 nitrite per 1 pH unit change. Depending on the conditions (e. g., pH, alkalinity, nitrite concentration), pH may need to be taken into account during nitrite measurement. The developed carbon fiber nitrite microsensor successfully measured nitrite in a nitrifying biofilm and is applicable for in situ analysis in other micro-environments (e. g., microbial mats and sediments). Published by Elsevier B.V.
Journal Title
Sensors and Actuators B-Chemical
Volume
Sens. Actuator B-Chem.
Publication Date
1-1-2013
Document Type
Article
Language
English
First Page
1263
Last Page
1269
WOS Identifier
188
ISSN
0925-4005
Recommended Citation
"Amperometric carbon fiber nitrite microsensor for in situ biofilm monitoring" (2013). Faculty Bibliography 2010s. 4285.
https://stars.library.ucf.edu/facultybib2010/4285
Comments
Authors: contact us about adding a copy of your work at STARS@ucf.edu