contaminated rice was found in a railway station of Inner Mongoliaprovince on Jun.3,1994.Under the analysis with combined GC-MS, thecontamitant was determined to be Terbufos,an imported organophorous pesticidewhich is forbidden tobe used in China.The results showed that the use andtransportation of some pesticides are out of control,and the great attentionshould be given to the prevention of food conamination in rail tranportation.Author'saddress Zhang Ying, Institute of Food Safety Control andInspection,Ministry of HealtBeijing 100021,PRC