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   ×   10 −9 to 4.0   ×   10 −7   g   mL −1 . The detection limit (3 σ ) was 6.3   ×   10 −10   g   mL −1 and the relative standard deviation for 1.0   ×   10 −7   g   mL −1 phenol ( n   =   11) was 2.99%. The regression equation was I   =   120.79   +   1.14   ×   1010 c ( R   =   0.9936). This method has been applied to the determination of phenol in water with satisfactory results.