|Title:||A chitosan grafted mesoporous carbon aerogel for ultra-sensitive voltammetric determination of isoniazid||Authors:||Nehru, Raja
Chen, Shen Ming
|Keywords:||Carbon aerogel | Chitosan | Electrochemical sensor | Serum and urine | Tuberculosis drug||Issue Date:||1-Jul-2019||Journal Volume:||186||Journal Issue:||7||Source:||Microchimica Acta||Abstract:||
© 2019, Springer-Verlag GmbH Austria, part of Springer Nature. A screen-printed carbon electrode (SPCE) was modified with chitosan (Chit) supported on carbon aerogel (CA) to obtain an electrochemical sensor for the tuberculosis drug isoniazid (INZ). The interconnected mesoporous structure of Chit/CA provides a large surface area (SBET = 461 m2 g−1) and good porosity (VTot = 0.69 cm3 g−1). Besides, the modified SPCE displayed enhanced electrocatalytic activity due to the presence of numerous active sites (such as >C=O, -NH-, -NH2, -OH). Figures of merit include (a) a typical working voltage of 0.28 V (vs. Ag/AgCl), (b) high sensitivity (8.09 μA μM−1 cm−2), (c) a wide linear response to INZ (0.01–115 μM) and (d) a low detection limit (8 nM). The modified electrode has successfully been applied to the determination of INZ in spiked serum and urine, and recoveries ranged from 97.8 to 99.8%.
|Appears in Collections:||政治學系|
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