环境卫生学2005.6 实习内容 Practising contents 饮水硬度测定 Drinking water hardness assay 五日生化需氧量 Biochemical Oxygen Demand during 5 days 水中三氮的测定 Ammonia nitrogen, nitrite and nitrate test in water 饮水消毒 Drinking water disinfection 环境样品的采样与预处理 Sampling and pretreatment of samples in environment环境卫生学2005.6 饮水硬度测定 Drinking water hardness assay 五日生化需氧量 Biochemical Oxygen Demand during 5 days 水中三氮的测定 Ammonia nitrogen,nitrite and nitrate test in water 饮水消毒 Drinking water disinfection 环境样品的采样与预处理 Sampling and pretreatment of samples in environment 实习内容 Practising contents