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Post‐chemiluminescence behaviour of Ni 2+ , Mg 2+ , Cd 2+ and Zn 2+ in the potassium ferricyanide–luminol reaction
Author(s) -
Feng Na,
Lu Jiuru,
He Yunhua,
Du Jianxiu
Publication year - 2005
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.836
Subject(s) - chemiluminescence , luminol , chemistry , radiochemistry , ferricyanide , nuclear chemistry , potassium , isotopes of potassium , zinc , inorganic chemistry , organic chemistry
A new chemiluminescence (CL) reaction was observed when Ni 2+ , Mg 2+ , Cd 2+ or Zn 2+ was injected into the reaction mixture after the finish of the CL reaction of alkaline luminol and potassium ferricyanide. This reaction is described as a post‐chemiluminescence (PCL) reaction. The possible mechanism for the PCL was proposed based on studies of the CL kinetic characteristic and the CL spectra. The experimental conditions of the CL reactions were optimized and the feasibility of using the reaction to analyse these metal ions was evaluated. The PCL reaction method operates in the ranges: 1 × 10 −7 –8 × 10 −6 g/L Ni 2+ ; 3 × 10 −6 –2 × 10 −4 g/L Mg 2+ ; 8 × 10 −7 –1 × 10 −4 g/L Cd 2+ ; and 2 × 10 −4 –2 × 10 −3 g/L Zn 2+ , with detection limits of 4 × 10 −8 g/mL, 1 × 10 −6 g/mL, 3 × 10 −7 g/mL, 8 × 10 −5 g/mL, respectively. Copyright © 2005 John Wiley & Sons, Ltd.