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有害金属进入人体后,多以金属元素或金属离子形式存在,有些可转变为毒性更强的化合物。一次大剂量可引起急性中毒,但大多数属于低剂量长期摄入后在机体的蓄积造成的慢性危害。1.铅:粮食中限量为0.2mg/kg。铅在人体的生物半衰期为4年,骨骼中可达10年。侵犯神经系统、造血器官和肾脏,常见中毒症状有食欲不振、胃肠炎、口腔有金属味、失眠、头昏、关节肌肉疼痛、腹痛
Harmful metals into the human body, mostly in the form of metal elements or metal ions exist, some can be transformed into more toxic compounds. A large dose can cause acute poisoning, but most are chronic damage caused by accumulation in the body after long-term intake of low doses. 1. Lead: food limited to 0.2mg / kg. Lead in the human body biological half-life of 4 years, the bones of up to 10 years. Invasion of the nervous system, hematopoietic organs and kidneys, symptoms of common poisoning are loss of appetite, gastroenteritis, oral metallic taste, insomnia, dizziness, joint and muscle pain, abdominal pain