Handy TD and MonoTrap RGC18TD were used to screen the flavor components of Mikan juice. Handy TD is a compact, portable and easy-to-operate thermal desorption device. After sample collection, place the MonoTrap in the glass liner in the Handy TD, and introduce the heat-desorbed components into the GC inlet. A large number of terpenes, including Limonene, were found in citrus fruit.