Page 488 - Applied Pharmacognosy

• Insect fragments may be present in the

contents of the crude fiber and could be
detected by microscopical investigation.

• Insect fragments may be estimated by

destroying all the lignified elements by
treatment with acetic anhydride and sulfuric
acid, the collected residue consists of insect
particles.

• ( % of infestation using lycopodium spore

method ).

Pesticide residues