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硒是人体必需元素,我国某些地学与医学研究单位提出,大骨节病、克山病产生于水粮硒极低的环境。作者曾测定陕、甘、豫等省内几百个地点的饮水,其中30％以上的水样含硒量低于0.5μg/l,多数饮水含硒量极低,并发现在粮食含硒量低而饮水含硒量较高的地点无大骨节病。因此,需要准确可靠的测定方法。经参考国内外资料进行试验及改进,提出可准确测定硒低于0.05μg/l的方法如下,以供有关研究参考。 1.仪器和试剂:
Selenium is an essential element of the human body, and some geosciences and medical research institutes in our country propose that Kashin-Beck disease is caused by the extremely low water and selenium content in Keshan disease. The authors have determined the drinking water in hundreds of locations in Shaanxi, Gansu, Henan provinces, of which more than 30% of the water samples selenium content of less than 0.5μg / l, the majority of drinking water selenium content is very low, found in the food selenium content is low The location of high selenium drinking water without Kashin-Beck disease. Therefore, accurate and reliable measurement methods are required. With reference to domestic and foreign data for testing and improvement, the method for accurately determining selenium below 0.05 μg / l is provided below for reference. 1. Instruments and reagents: