卫生毒理学实验研究中,对制造中毒模型而必需进行的染毒期限问题研究的最少。苏联和其它国家为制定卫生标准而作毒理实验的期限差别很大。欧洲经济共同体各国为制定食品中外源性物质含量的容许水平,采取了下述方法:1.如果没有说明可能有远期效应,评价 In the experimental study of toxicology of health, the research on the problem of the poisoning period which is necessary to make the poisoning model is the least. The deadlines for toxicological experiments between the Soviet Union and other countries to develop health standards vary greatly. The countries of the European Economic Community have adopted the following methods in order to set the allowable levels of exogenous substances in food: 1. If there is no indication of possible long-term effects,