Method for simultaneously detecting contents of tin and lead in different forms in tobacco

The invention provides a method for simultaneously detecting the contents of tin and lead in different forms in tobacco. The method comprises the following steps: extracting tobacco to be determined by using a sample treatment solution, separating to obtain a supernatant, concentrating, and fixing the volume by using a mixed solution of a mobile phase A and a mobile phase B to obtain a to-be-detected sample solution, wherein the sample treatment solution is a mixed solution of a nitric acid aqueous solution and methanol, the mobile phase A is a nitric acid aqueous solution containing sodium hexanesulfonate, and the mobile phase B is methanol; meanwhile, performing a contrast test to obtain a blank to-be-detected sample solution; analyzing a series of standard solutions containing tin and lead in different forms by using an HPLC-ICP-MS, and making a standard curve; and analyzing the to-be-detected sample solution and the blank to-be-detected sample solution by using the HPLC-ICP-MS to obtain chromatographic pe