Table 1.

Phytochemical analysis of various extracts of Curcuma longa (rhizome).

S. no.	Secondary metabolites	Name of test	Various extracts of Curcuma longa
			Petroleum ether	Benzene	Chloroform	Methanol	Water
1	Alkaloid	Mayer’s test	−	−	−	+	+
		Hager’s test	−	−	−	−	−
2	Tannins and phenolic compounds	Ferric chloride test	+	+	+	+	+
		Vanillin hydrochloride test	+	+	+	+	+
3	Protein	Ninhydrin test	−	−	−	−	−
		Biuret test	−	−	−	−	−
4	Flavonoids	Shinoda test (magnesium hydrochloride reduction test)	+	+	+	+	+
		Alkaline reagent test	+	+	+	+	+
5	Steroids and triterpenoids	Salkowski test	−	−	−	−	−
		Libermann–Buchard test	−	−	−	−	−
6	Glycosides	Legal test	+	+	+	+	+
		Sodium nitroprusside test	+	+	+	+	+
7	Carbohydrates	Benedit’s test	+	+	+	+	+
		Fehling’s test	+	+	+	+	+