Method for determining residual quantities of organic solvents in temozolomide hexyl ester

The invention relates to a method for determining the residual quantities of organic solvents in temozolomide hexyl ester through capillary gas chromatography. The method comprises the following steps: 1, preparing internal standard solutions; 2, preparing contrast solutions; 3, preparing a tested object solution; and 4, injecting the above solutions to a chromatograph respectively to obtain chromatograms, and calculating according to the chromatograms to obtain the component kind and content of the organic solvents in the tested object solution.