信石(砷)在农业上已广泛应用,常用其浸种、拌种或作其它杀虫剂。因此,直接污染或通过容器(布袋、麻袋、缸等)间接污染粮食、食品而造成中毒事故者并不少见,尤以后者为多。究其原因,除生产队对信石保管不当外,则大多数的社员对信石之剧毒性质认识不足,往往对被信石或拌有信石的种子污染后的容器去毒处理不得法,或处理不彻底又去盛装粮食、 Smectite (arsenic) has been widely used in agriculture, commonly used in its seed soaking, seed dressing or other insecticides. Therefore, it is not uncommon for those who are directly contaminated or poisoned indirectly through foodstuffs (cloth bags, sacks, tanks, etc.) to contaminate food and foodstuffs, especially the latter. The reason is that apart from the improper custody of monoliths by the production team, most of the members do not have enough understanding of the highly toxic nature of monosodium glutamate and often detoxify containers contaminated with monuments or mixed seeds of limestone , Or do not handle it thoroughly to dress up food,