Biomimetic enhanced chemiluminescence of luminol-H2O2 system by manganese (III) deuteroporphyrin and its application in flow injection determination of phenol at trace level

A novel, sensitive and high selective flow-injection chemiluminescence (FI-CL) method for the determination of phenol is reported, based upon its decreasing effect on the CL reaction of luminol with hydrogen peroxide catalyzed by manganese (III) deuteroporphyrin [MnDP, Scheme 1, 3] in alkaline solution. Under the selected optimized experimental conditions, the relative CL intensity was linear with phenol in the range of 4.0 x 10(-9) to 4.0 x 10(-7) g mL(-1). The detection limit (3 sigma) was 6.3 x 10(-10) g mL(-1) and the relative standard deviation for 1.0 x 10(-7) g mL(-1) phenol (n = 11) was 2.99%. The regression equation was I = 120.79 + 1.14 x 1010c (R = 0.9936). This method has been applied to the determination of phenol in water with satisfactory results. (C) 2011 Elsevier B.V. All rights reserved.