The invention relates to a method for separating, measuring and collecting a
density gradient ultracentrifugal sample. The method comprises the following steps: S1, preparing a
density gradient solution by utilizing a full-automatic density
gradiometer; s2, adding a to-be-detected sample to the top of the
density gradient solution, and then carrying out overspeed refrigerated
centrifugation; after ultracentrifugation is completed, all components in the sample are separated into a
specific density layer; s3, separating and dropwise adding the centrifuged density gradient solution into a 96-hole
ultraviolet permeable elisa plate by using a density gradient solution
separation system according to a
siphon principle, so that target components in the density gradient sample are accurately separated into specific sample holes; s4, putting the 96-hole
ultraviolet permeable elisa plate into a full-
wavelength microplate reader, reading and measuring an OD value, and determining target component sample holes; s5, calculating the sample concentration; and S6, selecting required sample holes, and collecting and separating the solution in the corresponding holes to obtain the purified and concentrated density gradient ultracentrifugation sample target component. The method is simple, easy to operate, accurate and reliable.