NMR Confirmation and HPLC Quantification of Javamide-I and Javamide-II in Green Coffee Extract Products Available in the Market
Table 2
(a) The amounts of javamide-II in 1st and 2nd extractions. The mixture of seven green coffee extract samples (S1–S7) as described in Table 1 was extracted twice with 70% MeOH (50 mL), providing the 1st and 2nd extracts. The amounts of javamide-II were presented as mg per 1 g green coffee sample (). (b) The recovery yield of javamide-II. The purified javamide-II (1 mg) was added to the mixture of the seven green coffee extract sample containing 1 mg javamide-II and extracted with 70% MeOH. The recovery was determined using 1st and 2nd extracts ().
