Ethyl acetate solution certified reference material was prepared under strict control of preparation and packaging processes with high purity Ethyl acetate reagent as raw material. Homogeneity and stability were measured using GC-FID method. Concentration value of the reference material was 1.02 mg/mL, with an expanded uncertainty of 0.03 mg/mL based on cooperation analysis of 7 laboratories. Results indicated that the certified reference material met all technical requirements of national secondary reference material.

High purity Cyclehexanone reagent was used as a raw material of CRM,the Cyclehexanone solution certified reference material was developed under strictly controlled process of preparation and packaging.Homogeneity and stability tests were measured by GC-FID method.Set by cooperation analysis of 7 laboratories,the concentration value of the reference material was 0.98mg/mL,with an expanded uncertainty of 0.02 mg/mL.The results of homogeneity and stability tests showed that the certified reference material met the technical requirements of the national secondary reference material.The "Cyclohexanone Solution Standard Substance in Glyceryl Triacetate" developed in this project belongs to innovative standard substance varieties.At present,there is no certified standard substance either in China or around the world.Therefore,the "Cyclohexanone Solution Standard Substance in Glyceryl Triacetate" acquired in the project study will provide standard substance and substance standards for the dissemination of quantity value within China,and provide substance standard for the analysis of volatile organic compound in cigarette paper of tobacco industry;therefore,the project research has included extensive application value to the related field.