Page 405 - Applied Pharmacognosy
P. 405
Types of Chemical markers
• This is very useful, especially for herbal drugs present
in powdered form.
• Microscopical examination help to:-
• Confirming the identity of herbal ingredients through
the presence of diagnostic elements.
• Confirming purity through the absence of foreign
elements (indicates adulteration)
• a- Histological characters.
• Elements of diagnostic value in powdered
crude drugs ( key elements) leaves, flowers,
