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RP-HPTLC densitometric determination and validation of vanillin and related phenolic compounds in accelerated solvent extract of Vanilla planifolia

Sharma, Upendra Kumar, Sharma, Nandini, Gupta, Ajai Prakash, Kumar, Vinod, Kumar Sinha, Arun
Journal of separation science 2007 v.30 no.18 pp. 3174-3180
Vanilla planifolia, acetic acid, aluminum, densitometry, isopropyl alcohol, liquid-liquid extraction, methanol, phenolic compounds, pods, quality control, silica gel, vanillin
A simple, fast and sensitive RP-HPTLC method is developed for simultaneous quantitative determination of vanillin and related phenolic compounds in ethanolic extracts of Vanilla planifolia pods. In addition to this, the applicability of accelerated solvent extraction (ASE) as an alternative to microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE) and Soxhlet extraction was also explored for the rapid extraction of phenolic compounds in vanilla pods. Good separation was achieved on aluminium plates precoated with silica gel RP-18 F₂₅₄S in the mobile phase of methanol/water/isopropanol/acetic acid (30:65:2:3, by volume). The method showed good linearity, high precision and good recovery of compounds of interest. ASE showed good extraction efficiency in less time as compared to other techniques for all the phenolic compounds. The present method would be useful for analytical research and for routine analysis of vanilla extracts for their quality control.