Method for rapidly detecting trace amount of dibromophosphorus residue in agricultural product

The invention discloses a method for rapidly detecting trace dibromophosphorus residues in agricultural products, which comprises the following steps: step a, pretreatment to obtain a first to-be-detected substance; b, extracting and filtering to obtain a first liquid to be detected; c, adding a reaction solution, and reacting to obtain a second to-be-detected solution; step d, adding a sodium hydroxide solution for layered extraction, taking a lower layer, adding a saturated sodium chloride solution, uniformly mixing, and heating for reaction to obtain a third to-be-detected solution; step e, adding a third to-be-detected solution into the newly prepared copper hydroxide suspension, heating, and observing the phenomenon; and f, judging a result. The method disclosed by the invention is simple and easy to understand in principle, strong in specificity, high in sensitivity, visual in detection result, high in accuracy of the detection result, free of a large-scale analysis instrument, relatively less in time c