Effects of organic farming on minerals contents and aroma composition of Clemenules mandarin juice.

摘要

Consumers demand organic products because they believe that they are more flavourful and respectful to the environment and human health. Effects of organic farming on the mineral contents and aroma composition of Clemenules mandarin juices were studied. Minerals (Fe, Cu, Mn, Zn, Ca, Mg, K and Na) were quantified using atomic absorption-emission spectroscopy, while volatile compounds were extracted using the dynamic headspace technique, and were identified and quantified by GC-MS. In general, organic farming produced higher quality mandarin juice than that achieved by conventional agricultural practices. Higher concn. of both minerals and positive volatile compounds were found in the organic juice, while the formation of off-flavours was higher in the conventional juice, although threshold values were not reached.