SPECTROPHOTOMETRIC ANALYSIS OF COLOURANT EXTRACTS FROM THREE Different COLOURED Flowers of Tagetus erecta (L) AT DIFFERENT pH VALUES

  • APARNA BHARDWAJ* , SOMENDRA SHARMA**and E.R.AGHARIA* APARNA BHARDWAJ* , SOMENDRA SHARMA**and E.R.AGHARIA* *DEPARTMENT OF CHEMISTRY, MITHIBAI COLLEGE,VILE- PARLE (WEST), MUMBAI-400056, INDIA. **DEPARTMENT OF BOTANY, M.D. COLLEGE PAREL, MUMBAI-400012, INDIA. .Email: dr.aparna73@rediffmail.com and mhea22@rediffmail.com

Abstract

ABSTRACT:

Spectrophotometric analysis of the natural colourants from three different coloured flowers of Tagetus erecta (L) were carried out at different pH values. The results show that Tagetus erecta (L) extract (colourant) was stable at the experimental pH range of 2.60 – 9.36 (Light yellow coloured flowers) and 4.0- 12.0 (Orange coloured flowers) and 2.48 – 8.40 (Brown coloured flowers). This was indicated by the similar peaks of absorption maxima at the different pH values. Beer’s law is valid over the concentration range of 50 - 400 ppm. The colourant extract has absorption maximum at 470 nm, 410 nm and 480 nm respectively. Tagetus erecta (L) extract, with further studies could be used as a colourant in pharmaceutical formulations.

References

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Published
2015-06-30
How to Cite
E.R.AGHARIA*, APARNA BHARDWAJ* , SOMENDRA SHARMA**and. SPECTROPHOTOMETRIC ANALYSIS OF COLOURANT EXTRACTS FROM THREE Different COLOURED Flowers of Tagetus erecta (L) AT DIFFERENT pH VALUES. INTERNATIONAL RESEARCH JOURNAL OF CHEMISTRY, India, v. 10, june 2015. ISSN 2321-2845. Available at: <http://petsd.org/ojs/index.php/irjc/article/view/280>. Date accessed: 28 june 2017.

Keywords

Spectrophotometric analysis, Tagetus erecta, Colourant, Ph Effect.