示波极谱法测定水中痕量氨

在氢氧化钠介质中 ,用亚硝基铁氰化钾催化 ,氨与苯酚、次氯酸钠反应生成靛酚 ,并在滴汞电极上产生一灵敏的吸附波 ,其导数波波高与NH3 -N浓度在 0. 0 0 3～ 0 . 2 4mg·L-1范围内呈良好的线性关系 ,用于环境水中NH3 -N的测定 ,其相对标准偏差小于 3% ,加标回收率在 97%～ 10 3%之间 ,结果与光度法吻合。     

ELASTIC RECOIL DETECTION ANALYSIS OF LIGHT ELEMENTS IN THIN FILMS USING 35 MeV~(35) Cl~(6+) BEAM

In this paper, an elastic recoil detection analysis method is described using 35 MeV ~(35)Cl as incident ions. This method can determine and profile simultaneously H, D, He, C and O or in the other case, H, C, N and O. The depth resolution for the elements heavier than He is better than 20 nm. It has been applied to study the Co/Si and TiN thin films, and the depth profiles of He implanted in monocrystal silicon.     

以8-羟基喹啉为偶联剂测定水中NO2--N

报道了以8-羟基喹啉为偶联剂测定水中微量NO-2-N的方法.在拟定的实验条件下,NO-2-N浓度在0.01～1.60mg·L-1范围内与吸光度呈良好的线性关系,用于环境水中NO-2-N的测定,回收率在97%～103%之间,且简便、快速.