unabsorbed sodium bicarbonate was collected in a bottle and labeled 1 u201c saved 1 water u201d analysis showed that the filtrate 1 the saved 1 water contained just minor traces of polyphenols the beans of batch 1 were allowed to dry overnight and were ground and brewed the following day using a standard household coffee maker with regular tap water batch 1 produced a brewed coffee with a 17 increase of chlorogenic acid and a 34 increase in total polyphenols when compared with the control batch batch 1 8 oz of dark roasted coffee beans u2014 treated with 1 2 oz of sodium bicarbonate 15 of bean weight sodium bicarbonate component in aqueous solution dissolved in 14 4 oz of bottled water u201c treated water u201d beans were placed in a large filter and the sodium bicarbonate solution was poured over the beans and allowed to filter out the filtrate treated water and unabsorbed sodium bicarbonate was collected in a bottle and labeled 2 u201c saved 2 water u201d analysis showed that the filtrate 1 the saved 2 water contained just minor traces of polyphenols the beans of batch 2 were allowed to dry overnight and were ground and brewed the following day.