Journal
ELECTROANALYSIS
Volume 20, Issue 19, Pages 2102-2112Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200804294
Keywords
Creatinine sensor; Molecularly imprinted polymer; Sol-gel; Graphite electrode; Differential pulse; Cathodic stripping Voltammetry
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Funding
- Department of Science and Technology [SR/SI/IC-18/2006]
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An electrochemical creatinine sensor based on a molecularly imprinted polymer (MIP)-modified sol-gel film on graphite electrode was developed. The surface coating of MIP over sol-gel was advantageous to obtain a porous film with outwardly exposed MIP cavities for unhindered selective rebinding of creatinine from aqueous and biological samples. A fast differential pulse, cathodic stripping voltammetric response of creatinine can be obtained after being preanodized the sensor in neutral medium containing appropriate amount of creatinine at + 1.8 V versus SCE for 120 s. A linear response over creatinine concentration in the range of 1.23 to 100 mu g mL(-1) was exhibited with a detection limit of 0.37 mu g mL(-1) (S/N= 3).
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