6DI J W, WU Y, MAY. A novel spectmphotometric determination of trace copper based on charge transfer complex [ J ]. Spectrochimica Acta Part A, 2005, 61 (5) : 937-941.
7LUNVONGSA S , TAKAYANGNAGI T, OSHIMA M, et al. Novel catalytic oxidative coupling reaction of N, N-dimethyl-p-phe- nylenediamine with 1,3-phenylenediamine and its apphcations to the determination of copper and iron at trace levels by flow injection technique [ J ]. Analytica Chimica Acta, 2006, 576 ( 2 ) : 261-269.
8CAO S A, ZHONG J C, KIYOSHI H, et al. On-line monitoring of trace copper( II ) in steam condensate and boiler feed- water by flaw injection based on its catalytic effect on the oxidation of hydroquinone by hydrogen peroxide [ J ]. Analytica Chimica Acta, 1996, 331(3) : 257-262.