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以中学教师和北京市瘁死居民为对象，在严格的质量保证措施下，对北京市居民血、发和脏器铅、镉背景值进行了研究。结果表明，北京市男性吸烟者、不吸烟者及女性不吸烟者的血铅均值分别为８５．０、７４．６和５６．７μｇ／Ｌ，血镉为２．２３、０．７８和０．８３μｇ／Ｌ，其９５％上限值血铅分别为１６０．２、１３１．４和１０７μｇ／Ｌ，血镉分别为６．５、１．９８和１．９５μｇ／Ｌ。各脏器（鲜重，以下同）铅、镉背景值分别为：肝，０．２２和０．８４ｍｇ／ｋｇ；肺，０．１１和０．１７ｍｇ／ｋｇ；心，０．０１４和０．０１２ｍｇ／ｋｇ；脾，０．０３８和０．０７１ｍｇ／ｋｇ；肾，０．０７９和３．９３ｍｇ／ｋｇ；肌肉，０．０５８和０．０２７ｍｇ／ｋｇ，并讨论了血、发和各脏器铅镉含量间的相关性及其意义。
Taking secondary school teachers and bereaved residents in Beijing as subjects, the background values of lead and cadmium in blood, hair and organs of Beijing residents were studied under strict quality assurance measures. The results showed that the average blood lead levels of male smokers, non-smokers and female non-smokers in Beijing were 85.0, 74.6 and 56.7 μg / L, respectively, and the blood cadmium was 2.23, 0.78 and 0. 83 μg / L. The upper limit of 95% blood lead was 160.2, 131.4 and 107 μg / L respectively, and the blood cadmium was 6.5, 1.98 and 1.95 μg / L, respectively. The background values of lead and cadmium for each organ (fresh weight, the same below) were: liver, 0.22 and 0.84 mg / kg; lung, 0.11 and 0.17 mg / kg; 012mg / kg; Spleen, 0.038 and 0.071mg / kg; Kidney, 0.079 and 3.93mg / kg; Muscle, 0.058 and 0.027mg / kg, Correlation between lead and cadmium content and its significance.