Page 501 - Applied Pharmacognosy

Quantitative microscopy

• the microscope is an aid to vision

• it is impossible to make weighing directly

• the weight of any material is estimated by counting particles

the average mass of which is known. 1 2

•

• So, quantitative measurements is carried

• out by using internal standard

• Lycopodium spores

• Lycopodium clavatum

• The average no. of lycopodium spores per 1 mg powder

lycopodium is 94000 spores.