The invention discloses detection test paper for detecting
benzoyl peroxide in flour and preparation method of the detection test paper. The test paper comprises a test strip and a standard colourimetric card, wherein the standard colourimetric card comprises 10 color lumps with corresponding concentration gradients of
benzoyl peroxide from shallow to deep respectively 0mg / L, 12 mg / L, 36 mg / L, 60mg / L, 84 mg / L, 108 mg / L, 132 mg / L, 156 mg / L, 180 mg / L and 228 mg / L. The test strip comprises a substrate and a color-developing layer adhered on the front end of the substrate, the color-developing layer has a test function, the substrate is made of a PVC (
polyvinyl chloride) sheet, and the color-developing layer is prepared by immersing a
cellulose acetate film in a color-developing
mixed solution consisting of 5-10 percent of
potassium iodide, 0.2-0.8 percent of soluble
starch and 2-8 percent of
sodium carbonate and then
drying in vacuum at a temperature of 40-80 DEG C for 20-50min. According to the comparison of the color-developing degree of a sample to be detected and the standard colourimetric card, the content range of the
benzoyl peroxide can be rapidly judged. The detection test paper disclosed by the invention is simple, rapid and visual in operation when being used for detecting the benzoyl
peroxide remained in the flour, and has high detection sensitivity and accuracy.