[IEEE 2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT) - Kanyakumari District, India (2014.7.10-2014.7.11)] 2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT) - An electrochemical DNA-Prussian blue-carbon paste biosensor for the detection of ascorbic acid in pharmaceuticals