Collection and Processing of Crude Drugs
Start with the big picture
The collection stage aims to gather plant material when secondary metabolites are at suitable levels and to avoid contamination, admixture, or substitution. Collection timing depends on the plant part: for example, leaves are gathered before flowering, flowers at full bloom, and roots or rhizomes after flowering or during dormancy. Dry, pest-free conditions and clean, non-reactive tools support good handling, while records help maintain traceability. Primary processing includes removing unwanted material, reducing size, and drying appropriately to limit enzymatic and microbial spoilage. Garbling, grading, and standardization help assess purity and quality. Suitable packaging, storage, labeling, pest control, and routine quality checks then help protect the crude drug and document its identity and handling.
What you'll learn
- Explain how harvest timing varies among leaves, flowers, roots, barks, fruits, and seeds.
- Identify field conditions, tools, and records that support careful collection.
- Describe the roles of cleaning, size reduction, drying, and garbling in primary processing.
- Summarize how grading, packaging, storage, and labeling support quality and traceability.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
