International Journal of Physical Sciences
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Article Number - 11D4AB855243

Vol.12(24), pp. 354-359 , December 2017
ISSN: 1992-1950

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Full Length Research Paper

Spectroscopy and chemical analysis of natural dye from Sorghum bicolour

O. Babatunde
  • O. Babatunde
  • Department of Chemical Sciences, Ajayi Crowther University, Oyo, Nigeria.
  • Google Scholar

 Received: 25 October 2017  Accepted: 28 November 2017  Published: 30 December 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0

Many plants produce very attractive flowers, leaves and fruits. Colour pigments that are derived from nature are believed to be environmentally friendly because of their non-toxic, non-carcinogenic and biodegradable nature. In this project, colour pigment from ethanol extract of Sorghum bicolour was investigated using three different spectroscopic techniques (UV-Vis, FT-IR and GC/MS). The effects of dyeing parameters; temperature, pH and the presence of mordant on dyeing quality of the extract were also examined. UV-VIS absorption spectra indicates a λmax peak at 535 nm, value associated to delphinidin dyes under bathochromic shift. Structural characterization by FT-IR revealed presence of C=O, OH and C=C of aromatic. Twelve phytochemicals were identified through GC/MS study.The extract showed colour change from brown to red between pH ranges of 3 to 12. The best dyeing quality was achieved at 30°C with alum pre-treated cloth at neutral pH. Presence of delphinidin dye in S. bicolour extract was confirmed from spectroscopy and chemical analysis results; however, further feasibility study has to be carried out on S. bicolour before it can be applied as dye in industry.
Key words: Sorghum bicolour, spectroscopy, natural dye, delphinidin.

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APA Babatunde, O. (2017). Spectroscopy and chemical analysis of natural dye from Sorghum bicolour. International Journal of Physical Sciences, 12(24), 354-359.
Chicago O. Babatunde. "Spectroscopy and chemical analysis of natural dye from Sorghum bicolour." International Journal of Physical Sciences 12, no. 24 (2017): 354-359.
MLA O. Babatunde. "Spectroscopy and chemical analysis of natural dye from Sorghum bicolour." International Journal of Physical Sciences 12.24 (2017): 354-359.

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