德国1991年增订和修订了作业场所空气中化学物质最高容许浓度28种(表1)和生物接触限值3种(表2)。在作业场所空气中致癌物浓度与生物材料中该物质或其代谢产物之间的相互关系(即致癌物的接触当量,EKA)方面,也作了一些修改, In 1991, Germany revised and updated the maximum allowable concentrations of chemicals in the air at the work site of 28 species (Table 1) and biological exposure limits (Table 2). There have also been some changes in the correlation between the concentration of carcinogens in the air at workplaces and the substance or its metabolites in biomaterials (ie, the contact equivalent of carcinogens, EKA)