Six coded market brands against a lab-made reference: ash, extractives, LOD, microscopy, TLC/HPTLC and Folin–Ciocalteu, with ANOVA.
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- Ayurvedic Pharmacopoeia of India / Ayurvedic Formulary of India monograph parameters
- Powder microscopy (phloroglucinol–HCl, chloral hydrate mounts)
- Ash values, extractive values, loss on drying, pH
- TLC on silica gel 60 F254 with gallic acid reference; HPTLC densitometry if available
- +3