引用本文:
Yuan Zhen Zhou, Li Juan Zhang, Shuang Li Chen, She Ying Dong, Xiao Hui Zheng. Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid[J]. Chinese Chemical Letters,
2009, 20(2): 217-220.
doi:
10.1016/j.cclet.2008.10.026
Citation: Yuan Zhen Zhou, Li Juan Zhang, Shuang Li Chen, She Ying Dong, Xiao Hui Zheng. Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid[J]. Chinese Chemical Letters, 2009, 20(2): 217-220. doi: 10.1016/j.cclet.2008.10.026
Citation: Yuan Zhen Zhou, Li Juan Zhang, Shuang Li Chen, She Ying Dong, Xiao Hui Zheng. Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid[J]. Chinese Chemical Letters, 2009, 20(2): 217-220. doi: 10.1016/j.cclet.2008.10.026
Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid
摘要:
A carbon paste electrode modified with electropolymerized films of isonicotinic acid was developed. The modified electrode shows excellent electrocatalytic activity toward the oxidation of both dopamine (DA) and epinephrine (EP). Separation of the reduction peak potentials for dopamine and epinephrine was about 357 mV in pH 5.3 phosphate buffer solution (PBS) and the character was used for the detection DA and EP simultaneously. The peak currents increase linearly with DA and EP concentration over the range of 8.0×10-5 to 7.0×10-4 mol/L and 5.0×10-6 to 1.0×10-4 mol/L with detection limits of 2×10-5 and 1×10-6 mol/L, respectively. The interference studies showed that the modified electrode exhibits excellent selectivity in the presence of large excess of ascorbic acid (AA).
English
Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid
Abstract:
A carbon paste electrode modified with electropolymerized films of isonicotinic acid was developed. The modified electrode shows excellent electrocatalytic activity toward the oxidation of both dopamine (DA) and epinephrine (EP). Separation of the reduction peak potentials for dopamine and epinephrine was about 357 mV in pH 5.3 phosphate buffer solution (PBS) and the character was used for the detection DA and EP simultaneously. The peak currents increase linearly with DA and EP concentration over the range of 8.0×10-5 to 7.0×10-4 mol/L and 5.0×10-6 to 1.0×10-4 mol/L with detection limits of 2×10-5 and 1×10-6 mol/L, respectively. The interference studies showed that the modified electrode exhibits excellent selectivity in the presence of large excess of ascorbic acid (AA).
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Key words:
- Dopamine
- / Epinephrine
- / Isonicotinic acid
- / Ascorbic acid
- / Simultaneous determination
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