Dragendorff test
Dragendorff test is a color test to detect alkaloid in test sample using Dragendorff reagent. Alkaloid if present in the solution of sample, it will react with Dragendorff reagent and produce orange or orange red precipitation.[1] [2]
Composition
Solution of potassium bismuth iodide is called Dragendroff’s reagent. It contains basic bismuth nitrate [Bi(NO3)3 or BiN3O9], tartaric acid [C4H6O6 or HO2CCH(OH)CH(OH)CO2H] and potassium iodide (KI) solution.1.7 gm basic bismuth nitrate and 20 gm tartaric acid ware dissolved in 80 ml water. This solution was mixed with a solution contains 16 gm potassium iodide and 40 ml water.[3]
References
- ^ Nayeem AA, Khatun A, Rahman MS, Rahman M. Evaluation of phytochemical and pharmacological properties of Mikania cordata (Asteraceae) leaves. Journal of Pharmacognosy and Phytotherapy, 2011; 3(8): 118-123.
- ^ Ghani A. Medicinal Plants of Bangladesh. 1st ed. The Asiatic Society of Bangladesh, Dhaka, Bangladesh, 1998; p.505.
- ^ Khatun A, Rahman M, Jahan S. Preliminary phytochemical and pharmacological screening of Murraya exotica Linn. leaves extract. Oriental Pharmacy and Experimental Medicine, 2014; 14(3): 223-229. DOI: 10.1007/s13596-014-0150-x