Abstract

Within the framework of determining capping and stabilizing bioactive components present in Canna indica towards nanoparticles synthesis, phytochemical screening, total phenolic content, infrared spectroscopy and chromatographic characterisation were carried out on the locally sourced plant. Extracts were prepared from C. indica leaves using ethanol, de-ionised water (DW) and ethanol/DW in ratio 1:1. Qualitative screening showed the presence of saponins, alkaloids, terpenoids, phenols and coumarins. Highest total phenolic content (TPC) was observed in the aqueous fraction and least in ethanol fraction. Characterisation was carried out using Fourier Transform - Infrared spectroscopy (FT-IR) and Gas Chromatography - Mass Spectrometry (GC-MS). Absorption bands observed from FT-IR analysis showed presence of aromatic O-H stretch (3300 cm−1) and aromatic C=C stretch (1451 and 1640 cm−1) respectively. GC-MS analysis of ethanolic extract indicated the presence of dl-.alpha.-tocopherol – a phenolic compound.

Highlights

  • In recent years, metallic nanoparticles have gained prominence in the field of environmental studies due to their unique features, such as magnetic susceptibility, low toxicity, among others [1,2]

  • Extracts were prepared from C. indica leaves using ethanol, deionised water (DW) and ethanol/DW in ratio 1:1

  • Characterisation was carried out using Fourier Transform - Infrared spectroscopy (FT-IR) and Gas Chromatography - Mass Spectrometry (GC-MS)

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Summary

Introduction

Metallic nanoparticles have gained prominence in the field of environmental studies due to their unique features, such as magnetic susceptibility, low toxicity, among others [1,2]. Canna indica (Indian shot) locally known as “Ido” in South-west Nigeria is a medicinal plant found in parts of Africa and Asia. The aim of this study was to determine the phytochemical composition of C. indica (Indian shot) and characterize thefunctional groups and chemical structures of the specific phenolic moieties present using Fourier Transform - Infrared spectroscopy (FT-IR) and Gas ChromatographyMass Spectrometry (GC-MS), respectively. This will (i) provide information on phenolics responsible for capping/stabilisation of synthesised nanoparticles and (ii) facilitate understanding of reaction pathways during nanoparticles synthesis. The dried leaves were pulverized and preserved in air tight containers until further use [15,16]

Sample preparation and characterisation
Phytochemical screening of Canna indica leaves extracts
Determination of total phenolic content
Conclusion
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