Abstract: With the new developing gas ingredie nts analysis facility——Prisma300,the outgassing ingredie nts of nonmetal materials are tested and an alyzed in the environment of simulation space.They are condensed on the cold quartz glass.The change of the quartz glass transmission is tested.Can be drawn by performing an experiment on many different nonmetal materials,the outgassing ingredients that can change observably the quartz glass transmission will been found out.