Abstract
FTIR and UV–Vis techniques, being essential tools for analytical and research applications, were used to provide first-hand spectroscopic information on the phytochemical constituents present in Sporobolus spicatus, a halophytic plant commonly referred to as salt grass. The plant sample used in the analysis was collected from the Okavango Delta area, Republic of Botswana. Preliminary phytochemical screening on the whole plant parts shows positive tests for flavonoid and phenolic compounds but absence of saponins. FTIR method in the mid-infrared region 4000–400 cm−1 revealed the characteristic peak values, intensity and functional groups present in the plant. The FTIR wavenumber frequencies of the crude aqueous-ethanolic extracts of the leaves, stem bark and root compared to corresponding raw dry plant parts confirmed the presence of alcohols, phenols, alkanes, esters, carboxylic acids, aromatics and possibly aliphatic amine compounds as major phytochemical constituents in the plant. The transmission, reflection and absorption data as a function of wavelength and absorption coefficient were determined by UV–Vis spectroscopy in solution and solid states ranging from 200–800 nm on a double beam Perkin Elmer spectrophotometer. Well resolved and separated characteristic broad absorption band peaks at the wavelength λmax 280–450 nm mostly associated with flavonoid and other phenolic compounds were obtained. In addition, a preliminary investigation into salt uptakes ability of the plant in predetermined concentrations of sodium chloride solution was carried out by pH and conductimetry methods. The report in this paper is the first communication on spectroscopic analysis of Sporobolus spicatus which is intended to provide useful information for further research on the value-added applications in biotechnology for the development of salt-tolerant crops for use in salt-afflicted agro-ecosystems or as a natural agent for wastewater purification and desalination.
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Acknowledgements
The author wishes to express appreciations to Prof. Oluwatoyin Kolawole and Mr Joseph Madome of the Okavango Research Institute, Maun, Botswana for the collection and identification of the plant.
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Adeloye, A.O. (2019). Conductimetric Analysis and Preliminary Evaluation of Phytochemical Constituents of Sporobolus spicatus (Vahl) Kunth [Family: Poaceae] by FTIR and UV–Vis Spectroscopic Techniques. In: Ramasami, P., Gupta Bhowon, M., Jhaumeer Laulloo, S., Li Kam Wah, H. (eds) Chemistry for a Clean and Healthy Planet. ICPAC 2018. Springer, Cham. https://doi.org/10.1007/978-3-030-20283-5_3
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