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镉是具有高度毒性,又常易以危险的含量水平进入人类食物链中的一个有害元素。土壤中镉的自然本底含量是环境卫生和环境科学的基本资料,是正确判断土壤污染及评价危害程度的重要依据之一。测定土壤中镉含量主要是用原子吸收分光光度法,此法的测定条件分水相和有机相两种。何种测定条件适宜于测定土壤试样镉自然本底值是一个值得研究的问题。本文通过对吉林地区85个未受污染的自然土壤试样的分析,作了初步的比较。
Cadmium is a noxious element that is highly toxic and often enters dangerous levels of the human food chain. The natural background content of cadmium in soil is the basic information of environmental health and environmental science, which is one of the important bases for correctly judging soil pollution and evaluating the degree of harm. Determination of soil cadmium content is mainly by atomic absorption spectrophotometry, the method of determination of the conditions of the water phase and the organic two. It is worth to study which measurement conditions are suitable for determining the cadmium natural background value of soil samples. In this paper, a preliminary comparison is made on the analysis of 85 unpolluted natural soil samples from Jilin Province.