流动注射－化学发光法测定钽     

李先文  王屹  章竹君 《岩矿测试》1994,(4)

利用Ｔａ对鲁米诺－Ｈ＿２Ｏ＿２－Ｋ＿３Ｆｅ（ＣＮ）＿６化学发光体系的抑制作用，建立了痕量Ｔａ的化学发光分析法，由流动注射－化学发光仪实现测定。方法的检出限是５．０ｎｇ／ｍｌＴａ（Ｖ），测定范围为０．０１～１μｇ／ｍｌＴａ（Ｖ），测定０．０１μｇ／ｍｌＴａ（Ｖ）１１次的相对标准偏差为３．８％。方法已应用于矿石中Ｔａ的测定。  相似文献   

A comparison of the enzyme fluorometric and the peroxyoxalate chemiluminescence methods for measuring H2O2     

N. Beltz  W. Jaeschke  G. L. Kok  S. N. Gitlin  A. L. Lazrus  S. McLaren  D. Shakespeare  V. A. Mohnen 《Journal of Atmospheric Chemistry》1987,5(3):311-322

During September 25 to October 28, 1985, the enzyme fluorometric (Lazrus et al., 1985) and the peroxyoxalate chemiluminescence (Klockow and Jacob, 1986; Jaeschke, 1986) techniques for analyzing H₂O₂ were compared in laboratory studies at the National Center for Atmospheric Research in Boulder, Colorado, U.S.A. and under field conditions at the Whiteface Mt. field station of the Atmospheric Sciences Research Center, Albany, New York, U.S.A. Both methods showed excellent agreement, with a maximum deviation of ±5%. Only at unusually high concentrations of some potential atmospheric species could slight interferences be observed. During the experiments the detection limits were 1.3×10^-8 mol/l (0.44 ppbm) of H₂O₂ for the fluorometric instrument and 4×10^-8 mol/l (1.36 ppbm) of H₂O₂ for the chemiluminescence instrument. For the chemiluminescence technique, the response to methylhydroperoxide was approximately 80-fold less than that to an equivalent concentration of H₂O₂.  相似文献