Table 2.

UV Fluorescence Evaluation of the Powder of A. nilotica Pods.

Protocol	Daylight	UV Light Short-Wavelength (254 nm)	UV Light Long-Wavelength (365 nm)
Powder + acetic acid	Brown	Brown	Black
Powder + 10% HCl	Yellow	Brown	Green
Powder + 10% FeCl3	Green	Brown	Black
Powder + methanol	Brown	Brown	Green
Powder + acetone	Orange	Red	Black
Powder + 50% H2SO4	Black	Yellow	Brown
Powder + 50% HNO3	Brown	Purple	Brown
Powder + 10% ethanol	Brown	Green	Green
Powder + 99% ethanol	Yellow	Green	Brown
Powder + NaOH	Orange	Green	Yellow
Powder + chloroform	Brown	Green	Yellow
Powder + benzene	Yellow	Brown	Black
Powder + acetonitrile	Brown	Brown	Green
Powder + picric acid	Yellow	Brown	Yellow
Powder + diethyl ether	Brown	Brown	Black
Powder + n-Butanol	White	Green	Yellow