几年来通过地方病病区的大量调查,发现大骨节病与饮水中腐植酸含量有关。为了探讨地方病病因和寻找防病的途径,我所和吉林医大用纯腐植酸作了一批动物实验。为此,我们于1976年摸索出一个从土壤中提取纯净腐植酸的方法,简介如下:一、提取原理:腐植酸溶解于硷,并在酸性条件下形成 Over the past few years through a large number of endemic ward survey found that Kashin-Beck disease and drinking water in humic acid content. In order to explore the etiology of endemic diseases and to find ways to prevent disease, our institute and Jilin Medical University made a series of animal experiments with pure humic acid. To this end, we worked out in 1976 a method of extracting pure humic acid from soil, described as follows: First, the extraction principle: humic acid dissolved in alkaline and formed under acidic conditions