1. The No.16 Middle School of Qingdao City Shandong Province 266033; 2. Department of Chemisry, Normal College of Qingdao University, Shandong Province 266071
Abstract How to prevent,discover and prohibit terror blast in time is not only task of public security
and criminal detection,but also the scientific knowledge which science and technology workers should
have. This paper introduces the classification of hidden explosive, examination of material evidence of
blast, detection technique of hidden explosives and their vapour.
