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Table 2 Recovery results of caffeine and trigonelline by the developed fluorescence method

From: New fluorescence spectroscopic method for the simultaneous determination of alkaloids in aqueous extract of green coffee beans

Origin of green coffee beans sample Type of alkaloid in the sample Amount of alkaloid in the sample before spiking (mg/L) Amount of alkaloid added (mg/L) Amount of alkaloid found after spiking (mg/L) Recovery (%) (n = 3)
Abosto (Sidama) Caffeine 67.1 2 69.1 102 ± 3
Trigonelline 73.3 2 75.2 96.0 ± 3
Gedeo zone Caffeine 59.3 2 61.2 94.0 ± 2
Trigonelline 124 2 126 99.0 ± 2
Wendogenet (Sidama) Caffiene 73.2 2 75.2 101 ± 2
Trigonelline 93.2 2 95.2 102 ± 2