1Department of Chemistry and Research Centre, N.M.K.R.V. College for Women, Jayanagar, Bangalore 560 011, India
2Department of PG Studies and Research in Biochemistry, Jnana Sahyadri, Kuvempu University,
Shankaraghatta 577 451, Shivamogga, Karnataka, India
3Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai 400085, India
Adv. Mater. Lett., 2017, 8 (11), pp 1020-1028
DOI: 10.5185/amlett.2017.1554
Publication Date (Web): Aug 05, 2017
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E-mail: sureshssmrv@yahoo.co.in, jsmelo@barc.gov.in, neelgund@gmail.com
In this report, extractions of the Calotropis procera polyphenols have been carried out in conventional soxhlet assisted extraction (SAE) and it is compared with microwave assisted extraction (MAE). As an extension of our previous work reported, we attempted to study the electrochemical interaction of the aqueous plant extract with DNA modified electrode Gr/PAH/NT-G/PPy/DNA. The binding constant Kf determined using UV-Vis spectroscopy was found to be 4.91×10-1 and 4.55×10-1 µmol dm-3 for soxhlet assisted plant extract (SAPE) and microwave assisted plant extract (MAPE) respectively. This was consistent with the electrochemical determination of Kf 4.31×10-6 and 4.71×10-4 µmol dm-3 for SAPE and MAPE respectively. Further the surface coverage area (Γs) of the electrode fabricated using DNA was calculated using Chronocoulometry for the plant extracts. The linear range of the aqueous extract on the Gr/PAH/NT-G/PPy/DNA modified electrode was found to be from 1-250 µmol dm-3, with a limit of detection of 0.22 and 0.29 µmol dm-3 mL-1 for SAPE and MAPE respectively. The limit of quantification was found to be 0.68 and 0.88 µmol dm-3 mL-1 for SAPE and MAPE respectively. As a result Calotropis procera can be studied further to applied for anticancer activity. Moreover, electrochemical methods can be a promising technique in drug analysis.
Impedimetric detection, soxhlet assisted extraction, microwave assisted extraction, chronocoulometry, spectrophotometry.
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