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Journal of Drug Research in Ayurvedic Sciences 2021 January- March ; 6 (1) :20 -27
Quality assessment of Kajjali yoga: A classical Ayurvedic formulation

Abstract
BACKGROUND: Kajjali (black sulfide of mercury) is prepared with mercury and sulfur as per Ayurvedic classics and is an important ingredient in many Rasaushadhis (herbo-mineral/metallic drugs)/Ayurvedic medicines. Here, an attempt has been made to understand its chemical composition and microstructure characterization of this drug using AAS/ICP-AES, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). MATERIALS AND METHODS: Kajjali was prepared in three batches by taking equal proportions of Shodhita Parada (purified mercury) and Shodhita Gandhaka (purified sulfur) and ground in Khalwa yantra (mortar and pestle) till the disappearance of metallic luster of mercury and conversion of the compound into black powder. Ayurvedic specifications for the analysis of Kajjali yoga were carried out. Physico-chemical analysis, assay of elements by AAS and ICP-AES, and microstructure characterization by XRD and XPS were performed to ensure the chemical nature. RESULTS: The chemical analysis revealed that Kajjali yoga contains 49.50% of mercury and 45.50% of sulfur on average together with minor elements. It usually contains free sulfur as evident from a peak at 21.3° in the XRD pattern. The XRD pattern confirms to the low temperature cubic crystalline form of mercuric sulfide. CONCLUSION: The developed in-house quality standards for the Kajjali yoga may be used as quality standards for the Kajjali yoga and will also help the scientists and researchers for further studies. Keywords: Black sulfide of mercury, Kajjali, quality standard, XRD

DHARA ID: D060814


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