1 CONTROL 19.8 1 PIPERINE 13.0 1 LEMON 7.8 2 PIPERINE 5.3 2 PEPPER 11.0 2 HESPER 16.0 3 PEPPER 12.3 3 LEMON 5.3 3 ASCORBIC 11.7 4 LEMON 6.0 4 HESPER 10.0 4 CITRIC 11.2 5 CONTROL 17.3 5 HESPER 16.2 5 ASCORBIC 13.2 6 PIPERINE 10.8 6 ASCORBIC 16.0 6 CITRIC 17.2 7 CONTROL 18.0 7 PEPPER 12.7 7 CITRIC 15.7