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用中子活化法测定地表水体中的地球化学背景值是一项新的分析技术。该方法在我国七十年代初已广泛被应用。作者曾于1988年9月参加塔克拉玛干沙漠科学考察时采集和收集没有被污染的水样,主要取自克里雅河流域内的不同海拔高程的河流和湖泊中的地表水。这些水样经处理,在常温下蒸发以后,取其残留物用中子活化法进行照射,分析了7个水样从中得出30种化学背景值。分析结果表明,该流域内的各种水体地表水的地球化学背景值与干旱区的气候、生物条件及岩石的地球化学成分有密切关系。
Determination of geochemical background values in surface waters by neutron activation is a new analytical technique. This method has been widely used in China in the early seventies. The author collected and collected uncontaminated water samples during his scientific expedition to the Taklamakan Desert in September 1988, mainly from surface waters in rivers and lakes at different elevations within the Kriya River basin. These water samples were treated, evaporated at room temperature, and then the residue was irradiated by neutron activation method. Seven water samples were analyzed to derive 30 chemical background values. The analysis results show that the geochemical background values of surface water of various water bodies in the basin are closely related to the climate and biological conditions of arid areas and the geochemical composition of rocks.