From:  Canna indica silver nanoparticles (AgNPs): a green alternative for medicine

 Methodology to determine phytochemical properties [3339]

PhytochemicalMethodology
TanninsFew drops of 5% ferric chloride (CAS-7758-94-3) were added to 0.5 mL of WE. The color change to greenish black was observed.
SaponinsInto 0.5 mL of WE, 2 mL of DW was added, shaken vigorously for a few minutes. The formation of foam was observed.
Amino acidInto a test containing 0.5 mL of WE, 0.5 mL of ninhydrin solution (CAS-485-47-2) was added. The mixture was heated in the water bath for 20 min, and purple color change was observed.
AlkaloidInto 0.5 mL of WE, 3 drops of Mayer’s reagent were added (CAS-7789-99-3). The formation of yellowish precipitate was observed.
Reducing sugarInto 0.5 mL of WEs, 1 mL of Benedict’s reagent (CAS-63126-89-6) was added and boiled in a water bath. The color change from green to red was observed.
AnthocyaninInto 0.5 mL WEs, 0.5 mL of concentrated hydrochloric acid (CAS-7647-01-0) was added. The change of color to red/purple was observed.
PhenolsInto 0.5 mL of WEs, few drops of 10% ferric chloride (CAS-7758-94-3) were added. The color change to a green-blue or violet was observed.
PhlobatanninsInto 0.5 mL of WEs, 0.333 µL of hydrochloric acid (CAS-7758-94-3) was added. The formation of white precipitate was observed.
StarchInto 0.5 mL of WEs, few drops of iodine reagent (CAS-7553-56-2) were added. The color change to blue-black was observed.
FlavonoidsInto 0.5 mL of WEs,125 µL of aluminum chloride (CAS-7446-70-0) was added. The color change to yellow was observed.

DW: distilled water; WE: water extract