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This work demonstrates for the first time the electrochemiluminescence (ECL) of luminol on a Ti/TiO(2) NT electrode and its analytical application for the detection of pentachlorophenol (PCP). Luminol emits stable and intensive light on the Ti/TiO(2) NT electrode at -0.6 V, and PCP is found to be able to inhibit the ECL intensity. PCP is detected based on the inhibition of ECL intensity. The proposed method exhibits good reproducibility, wide-range linearity (0.3 pM to 3 μM), and high sensitivity with a limit of detection (LOD) of 0.1 pM (S/N = 3). The possible inhibition mechanism has also been discussed.
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Li et al. (2010) studied this question.
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