Page 467 - Applied Pharmacognosy

• The titration is carried out under an atmosphere of dry
nitrogen. (to eliminate interference from atmospheric
moisture)

• Disadvantages:
• The instability of the reagent.
• The possibility of substances in the sample other than

water, to react with the reagent.
•
IV. Spectroscopic methods

• Water absorb energy at various wave lengths throughout the
electromagnetic spectrum.