Identification of Bis(methylsulfanyl)methane and Furan-2(5)-one as Volatile Marker Compounds for the Differentiation of the White Truffle Species and .

Some truffles are expensive and, therefore, are prone to food fraud. A particular problem is the differentiation of high-priced truffles from cheaper truffles, both of which are white truffles with similar morphological characteristics. Using an untargeted approach, the volatiles isolated from samples of both species were screened for potential marker compounds by comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC×GC-TOFMS) and statistical analysis of the obtained semiquantitative data.