4Rui Liu, Jing Ji, Lingchong Wang, et al. Characterisation of nucleosides and nucleobases in Mactra veneriformis by high performance liquid chromatography coupled with diode array detector- mass spectrometry ( HPLC - DAD - MS ) [ J ] . Food Chemistry, 2012,135 ( 2 ) : 548-554.
5Microbiological Guidelines for ready- to- eat Food [ S ]. Food and Environmental Hygienedepartment of Hong Kong,2001.