Mafai Jeen (Clausena lansium (Lour.) Skeels) is originally cultivated in the Southern China and in the northern to central Vietnam. It was introduced into Thailand by Chinese since 1897 (Anonymous, 2001), where it was predominantly grown in Nan province, the northern Thailand. Mafai Jeen fruit was known of having medicinal functions for stomach upset, indigestion and coughing (Stuart, 1977). Additional contributions include, the identification of aroma compounds of Mafai Jeen for further use and study the effect of drying methods on Mafai Jeen. Mafai jeen fruits has outside appearance alike...