Flour dibenzoyl peroxide determination

Wheat flour, dibenzoyl peroxide determination, 698, 701 Workplace air benzoyl peroxide, 701 peracetic acid, 699 Wurster s reagent, hydroperoxide determination, 678, 684... 

A method for determination of various types of peroxides consists of RP-HPLC separation and applying post-column UV radiation to convert the peroxide to H2O2, which may be determined by CLD with bis(2,4,6-trichlorophenyl) oxalate (140) in the presence of 2,4,6,8-tetrathiomorpholinopyrimido[5,4-(J]pyrimidine (194) as fluorescence enhancer. Dibenzoyl peroxide and f-butyl perbenzoate have LOD (SNR 3) 6.8 and 7.5 p.M, respectively, and linearity range from 40 to 400 p.M. The method was applied for determination of dibenzoyl peroxide used as whitener of wheat flour, after extraction with ethanol . See a similar method in Section VLB.3. 

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See also in sourсe #XX -- [ ]

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