Determination of Trace Silver(Ⅰ) in Basic Aqueous Solution by Electrochemiluminescence of a New Reagent 6-(2-Hydroxy-4-Diethylaminophenylazo)-2,3-Dihydro-1,4-Phthalazine-1,4-Dione

Abstract

Abstract: The electrochemiluminescence (ECL) of a new reagent 6- (2-hydroxy- 4 diethy laminophenylazo)-2,3-dihydro-1 ,4-phthalazine-1,4-dione (HDEA) in a basic aqueous so lution was studied by using the apparatus designed by ourselves. Trace amounts of silver (Ⅰ) shows a significant effect on the efficiency of light emission of HDEA during a positive trigonometrical wave pulse was exerted on the solution. The linear relationship between the light intensity and the concentration of silver(Ⅰ) occurs in the range of 5. 0×10^-8 to 3. 0×10^-6 mol/L Ag(Ⅰ) in a medium of KOH-KCl-HDEA (pH= 12. 8). The detection limit of the method is 2. 0×10^-8 mol/LAg(Ⅰ), and the r. s. d. for 1.0×10^-7 mo)/L Ag (Ⅰ) is 5%. Of 21 metal ions concerned, only nickel(Ⅱ), cerium(Ⅳ) and cobalt(Ⅱ) interfere the silver detection seriously; I^- and B^- also have some interference.

Key words: Electrochemiluminescence, Reagent, Silver, 6-(2-Hydroxy-4 diethy laminophenylazo)-2,3-dihydro-1,4-phthalazine 1,4-dione

An Jingru, Lin Jinming . Determination of Trace Silver(Ⅰ) in Basic Aqueous Solution by Electrochemiluminescence of a New Reagent 6-(2-Hydroxy-4-Diethylaminophenylazo)-2,3-Dihydro-1,4-Phthalazine-1,4-Dione[J]. Chemical Research in Chinese Universities, 1991, 7(1): 32-36.

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Determination of Trace Silver(Ⅰ) in Basic Aqueous Solution by Electrochemiluminescence of a New Reagent 6-(2-Hydroxy-4-Diethylaminophenylazo)-2,3-Dihydro-1,4-Phthalazine-1,4-Dione

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