Flavor Formation of Boiled Radish

Abstract

Flavor compounds of boiled radish odor and changes of 4-methylthio-3-butenyl isothiocyanate (MTBeI) that has an irritating odor were studied. Flavor condensates of boiled radish prepared by shaking with ether and SDE method were analyzed with GC and GC-MS. The flavor of boiled radish showed strong hydrogen sulfide-like odors from the low boiling compounds and the desirable, boiled radish-like odor. The main flavor constituents were the same with those of the fresh radish odor.
It was thought that MTBeI was almost decomposed into the volatile CH₃SH, CH₃SSCH₃ and, in part, formed non-volatile compound (colour) and methylthiobuthyl isothiocyanate (MTBI) which was the main constituents of the boiled radish (78%). It was assumed that the decomposition of MTBeI and the remaining of MTBI or the change of MTBeI to MTBI were necessary for the formation of the boiled radish odor.