3.5. Changes in the main aroma components of pickled radish during storage
Flavor is one of the most important aspects in quality evaluation of pickled radish. GC–MS analysis demonstrated that there are 89 compounds in pickled radish, including 29 kinds of terpenes, 12 kinds of esters, 6 kinds of sulfides, 7 kinds of alcohols and so on.
OAV of volatile aroma compounds were calculated as the quotients of their concentration and the corresponding odor perception threshold from the literatures (Van Gemert, 2003), and the OAV higher or near 1 were listed in Table 2 together with the odor description. Fig. 4 is aromatic profiles obtained for pickled radish produced by HPP, TP and untreated during 0-day and 90-day storage at 4 °C on the basis of aromatic series calculated from the odor activity values of the corresponding aroma compounds. HPP-treated samples at day 0 had significantly more β-myrcene with fresh orange and terpenic aroma than TP-treated samples at day 0. Moreover, HPP-treated samples at day 90 had the least and untreated samples have the most sulfides with fish and sweat aroma.