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Year : 2023, Volume : 25, Issue : 1
First page : ( 71) Last page : ( 82)
Print ISSN : 0972-0979. Online ISSN : 0974-4517. Published online : 2023 January 17.
Article DOI : 10.5958/0974-4517.2023.00008.3

FTIR characterization and validation of secondary metabolites in leaf and bark extracts and direct powder of Erinocarpus nimmonii, an endemic plant

Puranik Anitha, Taranath Tarikere C.*

Environmental Biology and Green Nanotechnology Laboratory, P.G. Department of Studies in Botany, Karnataka University, Pavate Nagar, Dharwad – 580 003, Karnataka (India)

*e-mail: tctaranath@gmail.com

Online Published on 17 February, 2023.

Received:  21  ,  2022; Accepted:  22  ,  2023.

Abstract

The present study focused on the screening of therapeutically valuable secondary metabolites and FTIR analysis of sequential leaf and bark extracts and direct powder of Erinocarpus nimmonii Grah. ex Dalz., an endemic medicinal species of Malvaceae. Secondary metabolites were screened by using standard methods. FTIR spectral profiling of all extracts and powder was done, and matched with a set of peak values specific for each secondary metabolite. The phytochemical screening showed the presence of flavonoids, phenolic compounds, tannin, saponin, terpenoids, steroids, triterpenoids, gum and mucilage, but not alkaloids. The FTIR profile showed coinciding peak values specific for all the biomolecules tested, except alkaloids. Further, the presence of bidesmosidic triterpenoid saponin in leaf extract, alkyne in bark extract, and absence of cyanide peak were disclosed. This simple, affordable, and novel approach of secondary metabolite validation directs further advancement towards fractionation, while the use of direct powder still expedites the procedure by skipping the laborious extraction process. It enables the revelation of therapeutic biomolecules capped on green metallic nanoparticles. To be concise, it is a straightforward way to bridge the gap between the spectral profile of plants with the actual secondary metabolites they own.

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Keywords

Erinocarpus nimmonii, FTIR spectral profiling, Green metallic nanoparticle, Phytochemical screening, Secondary metabolites.

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