Page 468 - Applied Pharmacognosy
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• This fact is the basis for its quantitative determination.
•
• Measurements can be made in both the IR and UV regions ;
interfering substances must be absent.
• NMR spectroscopy is employed for the determination of
moisture in starch, cotton and other plant products.
• Spectroscopic methods are suitable for very small quantities
of water.
Ash values
• Ash values are very useful for detecting
• low – grade products, especially in powdered drugs.
