Page 135 - Medicinal Plants_PharmD general
P. 135
in dilute acetic acid with effervescence. Other reactions resemble the
oxalates.
3. Silica:
It occurs as incrustation of cell wall e.g. diatoms or as masses in
the cell e.g. cells of sclerenchymatous layer of cardamom. It is insoluble
in all acids except hydrofluoric acid.
-135-
