Method for extracting microcystin-LR (Laboratory reagent) from blue-green algae in Taihu Lake

The invention belongs to the application field of water treatment, and particularly relates to a method for extracting microcystin-LR (Laboratory reagent) from blue-green algae in Taihu Lake, which is used for extracting MC-LR by adopting the fresh blue-green algae in Taihu Lake as a raw material. Mainly, the method comprises the steps of preparing blue-green algae powder, extracting MC-LR and purifying. The method is an extraction and purification method of MC-LR that takes methanol solution as extraction solution and a C18 solid phase extraction column as a purification working station so as to pure MC-LR products with a high recovery rate. The method solves the difficulties of scarce MC-LR samples, expensive import price and high lab research cost during traditional research, and can rapidly and economically extract MC-LR from the fresh blue-green algae in Taihu Lake for the research of MC-LR.