Abstract
The electrochemiluminescence of aqueous alkaline luminol solutions has been studied by using rapid alternate positive and negative electrical pulses. Traces of copper are shown to change the proportion of the light emitted during the positive and negative pulses, measurement of which gives a linear log—log calibration plot for 1 × 10 -7 to 6 × 10 -6 M copper in glycine buffer at pH 10.15. Out of ten common cations tested only Hg(II), Pb(II) and Mn(II) interfered.
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