S－M是辽宁化工研究院生产的葡萄专用防腐剂（主要成分亚硫酸盐和硅胶），用来防止葡萄贮藏期的腐烂。同时还可以使果实和果梗保持新鲜．但如使用不当则会造成腐烂、脱粒、中毒。目前尚缺乏药剂施放过程对葡萄保鲜效果的试验，笔者多年来进行了探讨，以期对指导生产提供理论依 S-M is a special grape preservative (main components of sulfite and silica gel) produced by Liaoning Institute of Chemical Technology to prevent the decay of grape during storage. At the same time you can keep the fruit and fruit stems fresh. However, if used improperly, it will cause decay, threshing and poisoning. At present, there is still a lack of test on the effect of chemical release on grape preservation. The author has conducted discussions over the years to provide a theoretical basis for guiding the production