tôi đang cần tìm thông số Rf của betacaroten gấp. Mong các thành viên giúp đỡ. Ban nao có thông tin trên xin gửi bài liền lên diễn đàn. Cám ơn.
Định nghĩa Rf (Retardation factor) từ wikipedia và IUPAC.
http://en.wikipedia.org/wiki/Retention_factor
Rf value of beta-carotene was 0.65-0.70
S. TAMBE, S. KALE, P. SHAH, S. CHHAJED* (*M.G.V's Pharmacy College, Panchavati, Nasik, India): HPTLC analysis of beta-carotene in oral solid dosage forms. IPC 56th 2004, Abstract No. CP-32. A stability indicating HPTLC method has been developed for the analysis of solid dosage forms containing beta-carotene. HPTLC of beta-carotene on silica gel with petrol ether (40-60 °C) - methanol - toluene 4:8:1. Rf value of beta-carotene was 0.65-0.70. Quantification by densitometric evaluation at 460 nm. The method was validated for accuracy, precision, linearity, and stability, and can be adopted for routine analysis of beta-carotene in formulations. Pharmaceutical research, quality control, densitometry, comparison of methods, postchromatographic derivatization, quantitative analysis, beta-carotene