Research Article
Physicochemical and Phytochemical Analyses of Copra and Oil of Cocos nucifera L. (West Coast Tall Variety)
Table 5
Qualitative phytochemical analyses of coconut copra oil (commercial and by Soxhlet assembly).
| Test | Observation | Inference | Intensity |
| (1) Alkaloids | | | | (a) Dragendorff reagent | Brick red color | Alkaloids present | Low | (b) Wagner’s reagent | Reddish brown color | Alkaloids present | (2) Flavonoids | | | | (a) Ammonium test | No yellow color | Flavonoids absent | n.a. | (b) Aluminum chloride test | No yellow color | Flavonoids absent | (3) Glycosides | Dense red color | Glycosides present | Moderate | (4) Saponins | | | | (a) Emulsion test | Emulsion formed | Saponins present | Moderate | (b) Frothing test | Stable froth formed | Saponins present | (5) Resin | | | | (a) Precipitate test | White precipitate | Resins present | Low | (b) Color test | Light pink color | Resins present | (6) Tannins | | | | (a) Ferric chloride test | No green precipitate | Tannins absent | n.a. | (7) Steroids | | | | (a) Conc. H2SO4 test | Reddish brown precipitate at interface | Steroids absent | n.a. | (8) Terpenoids | | | | (a) Conc. H2SO4 test | Red precipitate | Terpenoid absent | n.a. | (9) Acid compounds test | | | | (a) Moist litmus paper | No color change in moist blue litmus | Acid compounds absent | n.a. |
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n.a.: not applicable.
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