铅是古老的金属,在自然界中分布甚广。铅中毒是常见职业病,治疗铅中毒过去多采用依地酸二钠钙(CaNa_2EDTA)。该药效果虽佳,但有时有副作用,特别是在连续接触铅的情况下,长期使用此络合剂对键康不利。为了寻找新的、有效驱铅药物,国外曾做了大量动物实验,证明低甲氧基果胶(以下简称果胶) Lead is an ancient metal, widely distributed in nature. Lead poisoning is a common occupational disease, the treatment of lead poisoning in the past to use calcium edetate disodium (CaNa_2EDTA). Although the drug effect is good, but sometimes there are side effects, especially in the case of continuous exposure to lead, long-term use of this complexing agent on the key health disadvantage. In order to find new and effective lead-removing drugs, a large number of animal experiments have been done abroad to prove that low-methoxy pectin (hereinafter referred to as pectin)