Comparison of chromatographic profiles of flavonoids and hydroxycinnamic acids of some species from Lamiaceae genus from Ukrainian PHARMACEUTICAL MARKET
The plants from the Lamiaceae family are traditional remedies of folk and scientific medicine. They are present at the domestic pharmaceutical market as herbal raw material (HRM); dietary supplements; aromatherapy; as well as being included in the composition of drugs for oral use etc. According to the modern direction of international harmonization of conditions for standardizations of herbal drugs, the topical issue is the development of unified methods of HPTLC identification for HRM, including the Lamiaceae family.
The aim of the work was the selection of the unified HPTLC chromatographic conditions for identification of chromatographic profiles of flavonoids and hydroxycinnamic acids of HRM of some Lamiaceae species of Ukraine’s flora, presented at domestic pharmaceutical market, such as Sage, Wild Thyme, Thyme, Oregano, Rosemary, Java tea, Peppermint, Lavender, Anise hyssop, Melissa, Hyssop, White horehound, Motherwort; and comparison of their chromatographic fingerprints.
As objects of investigation, the HRM of Lamiaceae family presented at the Ukrainian pharmaceutical market were used. The investigation was conducted by HPTLC procedure using an automatic herbal system of CAMAG, Switzerland at the base of CAMAG laboratory, Muttenz, Switzerland and laboratory of ESTCCTI ESIPP, NUPh, Kharkiv, Ukraine.
The harmonized chromatographic conditions for determination of flavonoids and hydroxycinnamic acids for HRM of Lamiaceae species were chosen, these were: stationary phase – HPTLC Si 60 F254; mobile phase – ethyl acetate, formic acid anhydrous, water (8:1:1); sample preparation: solvent – methanol; method of extraction – shaking for 10 min; relative humidity: 33%, temperature 22 ± 5 °C; derivatization with Natural product and PEG reagents; detection – 254 nm, 366 nm, white light before derivatization: 366 nm and white light after derivatization. The reproducibility of results in these chromatographic conditions was ∆RF ≤ 0,05. It was established, that for all investigated species of the family the zone corresponding with the position and colour to rosmarinic acid was detected, thus it can be used as standard substance for «Identification», «Limit-test» and for chromatographic system suitability test. For investigated samples of domestic HRM, the specific zones that can be used for setting acceptance criteria of the «Identification» and «Foreign matters» tests were conducted. After validation investigation involving greater numbers of samples of each species from different growing regions of Ukraine, the obtained HPTLC chromatographic fingerprints could be recommended as reference images for quality control of home-grown HRM of Lamiaceae family.
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