TY - JOUR
T1 - Amperometric determination of nitrite at poly(methylene blue)-modified glassy carbon electrode
AU - Xu, Guang Ri
AU - Xu, Guifang
AU - Xu, Ming Lu
AU - Zhang, Zhengqing
AU - Tian, Yuan
AU - Choi, Han Nim
AU - Lee, Won Yong
PY - 2012/2/20
Y1 - 2012/2/20
N2 - Electrochemical characteristics of nitrite ion were investigated at a poly(methylene blue)-modified glassy carbon electrode by cyclic voltammetry and differential pulse voltammetry. The poly(methylene blue)- modified glassy carbon electrode exhibited enhanced anodic signals for nitrite. The effects of key parameters on the detection of nitrite were evaluated at the modified electrode, such as pH, accumulation time, and scan rate. Under optimum condition, the chemically modified electrode can detect nitrite in the concentration range 2.0 × 10-6 to 5.0 × 10-4 M with the detection limit of 2.0 × 10-6 M and a correlation coefficient of 0.999. The detection of nitrite using the chemically modified electrode was not affected by common ions such as Na+, K+, Ca2+, Cl-, HPO4 2- and H2PO4 -. The modified electrode showed good stability and reproducibility. The practical application of the present method was successfully applied to the determination of nitrite ion in cabbage samples.
AB - Electrochemical characteristics of nitrite ion were investigated at a poly(methylene blue)-modified glassy carbon electrode by cyclic voltammetry and differential pulse voltammetry. The poly(methylene blue)- modified glassy carbon electrode exhibited enhanced anodic signals for nitrite. The effects of key parameters on the detection of nitrite were evaluated at the modified electrode, such as pH, accumulation time, and scan rate. Under optimum condition, the chemically modified electrode can detect nitrite in the concentration range 2.0 × 10-6 to 5.0 × 10-4 M with the detection limit of 2.0 × 10-6 M and a correlation coefficient of 0.999. The detection of nitrite using the chemically modified electrode was not affected by common ions such as Na+, K+, Ca2+, Cl-, HPO4 2- and H2PO4 -. The modified electrode showed good stability and reproducibility. The practical application of the present method was successfully applied to the determination of nitrite ion in cabbage samples.
UR - http://www.scopus.com/inward/record.url?scp=84863180962&partnerID=8YFLogxK
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U2 - 10.5012/bkcs.2012.33.2.415
DO - 10.5012/bkcs.2012.33.2.415
M3 - Article
AN - SCOPUS:84863180962
SN - 0253-2964
VL - 33
SP - 415
EP - 419
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
IS - 2
ER -