近年来报导,痕迹量(ppb以下)的致癌性N-亚硝胺已从多种食品和环境介质——大气、水、土、烟草烟气及机器加工润滑液中检出。探明水环境中这类致癌物的分布状况及动态变化,就测试方法而言,首先需要解决亚硝胺组分浓度低达超痕量级(ppt)的高效富集法。作为对挥发性亚硝胺筛测和检定的当前最有效 It has been reported in recent years that carcinogenic N-nitrosamines in trace amounts (below ppb) have been detected in various food and environmental media - air, water, soil, tobacco smoke and machined lubricating fluids. In order to test the distribution and dynamic changes of such carcinogens in water environment, we first need to solve the high enrichment method of nitrosamines concentration as low as ultra-trace levels (ppt). It is currently the most effective for the screening and verification of volatile nitrosamines