TY - JOUR
T1 - Highly sensitive and selective amperometric nitrite sensor based on electrochemically activated graphite modified screen printed carbon electrode
AU - Palanisamy, Selvakumar
AU - Karuppiah, Chelladurai
AU - Chen, Shen Ming
AU - Periakaruppan, Prakash
N1 - Funding Information:
This project was supported by the National Science Council and the Ministry of Education of Taiwan (Republic of China) .
PY - 2014/8/1
Y1 - 2014/8/1
N2 - A novel and sensitive amperometric nitrite sensor has been developed using electrochemically activated graphite (EAG) modified screen printed carbon electrode (SPCE) for the first time. The enhanced oxidation peak current (I pa) with lower oxidation overpotential (Epa) of nitrite is observed at EAG modified SPCE than that of electrochemically activated SPCE and graphite/SPCE. Under optimum conditions, the linear response of nitrite is found from 0.1 μM to 16.4 mM with a lower limit of detection of 38 nM. The sensitivity is calculated as 0.126 μA μM-1 cm-2. The EAG modified SPCE exhibits its high selectivity in the presence of common ions and biological co-active interfering species. In addition, the fabricated nitrite sensor shows a good repeatability, reproducibility and long term stability along with excellent practicality.
AB - A novel and sensitive amperometric nitrite sensor has been developed using electrochemically activated graphite (EAG) modified screen printed carbon electrode (SPCE) for the first time. The enhanced oxidation peak current (I pa) with lower oxidation overpotential (Epa) of nitrite is observed at EAG modified SPCE than that of electrochemically activated SPCE and graphite/SPCE. Under optimum conditions, the linear response of nitrite is found from 0.1 μM to 16.4 mM with a lower limit of detection of 38 nM. The sensitivity is calculated as 0.126 μA μM-1 cm-2. The EAG modified SPCE exhibits its high selectivity in the presence of common ions and biological co-active interfering species. In addition, the fabricated nitrite sensor shows a good repeatability, reproducibility and long term stability along with excellent practicality.
KW - Amperometry
KW - Electrocatalysis
KW - Electrochemically activated graphite
KW - Nitrite
KW - Screen printed carbon electrode
UR - http://www.scopus.com/inward/record.url?scp=84902688820&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2014.05.025
DO - 10.1016/j.jelechem.2014.05.025
M3 - Article
AN - SCOPUS:84902688820
SN - 1572-6657
VL - 727
SP - 34
EP - 38
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
ER -