The invention discloses a method for improving a Sudan red I detection kit and belongs to the field of
analytic chemistry. According to the method, a sample is pretreated to selectively enrich Sudan red I by a magnetic
solid-phase extraction mode and then is detected by the Sudan red I detection kit. The method comprises the following steps of accurately weighing the sample, putting the sample into a container, adding an extraction
solvent, oscillating and standing the container, and taking supernate as upper sample liquid; adding the upper sample liquid into a container holding a magnetic
solid-phase extraction material, oscillating the container, arranging a
magnet on the container, and pouring out the supernate; adding normal
hexane, oscillating the container, arranging a
magnet on the container, and pouring out the supernate; adding
acetone, oscillating the container, dropwise adding the supernate on a sample application plate, and
drying the sample application plate in a blowing manner; and executing other operations according to an operating manual of the detection kit. According to the method disclosed by the invention, the Sudan red I in the sample can be effectively and quickly enriched through magnetic
solid-phase extraction, so that the
detection limit of the kit is reduced by 3 times, and the phenomena of false positive and missing detection are avoided to an extremely large extent. The method has the advantages of simplicity, quickness, easiness in operation and the like, and is suitable for field test, and solvents can be saved.