Adulteration and evaluation of crude drugs
Start with the big picture
Adulteration may involve exhausted plant material, spurious species, foreign matter, synthetic mimics, deliberate admixtures, or accidental contamination. Economic incentives, scarcity, misidentification, poor storage, and weak regulation can contribute. Evaluation proceeds through complementary methods: organoleptic checks offer rapid screening; microscopy examines diagnostic structures; physicochemical tests assess purity; and chemical profiling looks for marker compounds and contaminants. Biological assays can help when chemical markers are unknown, while DNA-based and other advanced tools can distinguish closely related or processed materials. Results are considered against pharmacopoeial monographs, including specified quality limits. Prevention also depends on controlled cultivation, hygienic harvesting, traceable supply, and documented processing.
What you'll learn
- Distinguish major modes of crude drug adulteration.
- Identify common causes and illustrative examples of adulteration.
- Describe the roles of organoleptic, microscopic, and physicochemical evaluation.
- Compare chemical, biological, and molecular approaches to authentication.
- Explain how quality standards and good practices support prevention.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
