NDLI: A sensitive and selective nitrite sensor based on a glassy carbon electrode modified with gold nanoparticles and sulfonated graphene

Content Provider	Springer Nature Link
Author	Li, Su Juan Zhao, Guo Yan Zhang, Rong Xia Hou, Ya Li Liu, Lin Pang, Huan
Copyright Year	2013
Abstract	We describe a highly sensitive and selective amperometric sensor for the determination of nitrite. A glassy carbon electrode was modified with a composite made from gold nanoparticles (AuNPs) and sulfonated graphene (SG). The modified electrode displays excellent electrocatalytic activity in terms of nitrite oxidation by giving much higher peak currents (at even lower oxidation overpotential) than those found for the bare electrode, the AuNPs-modified electrode, and the SG-modified electrode. The sensor has a linear response in the 10 μM to 3.96 mM concentration range, a very good detection sensitivity (45.44 μA mM−1), and a lower detection limit of 0.2 μM of nitrite. Most common ions and many environmental organic pollutants do not interfere. The sensor was successfully applied to the determination of nitrite in water samples, and the results were found to be consistent with the values obtained by spectrophotometry. Figure A highly sensitive amperometric sensor for nitrite using a glassy carbon electrode modified with gold nanoparticles/sulfonated graphene (AuNPs/SG) composites is presented
Starting Page	821
Ending Page	827
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	180
Issue Number	9-10
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2013-04-27
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gold nanoparticles Graphene Nitrite Amperometry Sensor Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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