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本文叙述了测定土壤中微量钼的地球化学野外方法。土壤样品用硫酸及硝酸混合液浸溶,以代替碳酸盐-硝酸盐溶融的方法。讨论了有机物质、铜及其他各种干扰及测定时的条件,从而简化了分析手续,直接在浸提液中用硫氰化钾法测定钼。整个操作系在试管中进行,一个三人小组每日可进行约150个测定。与实验室方法比较的结果,证明此法在地球化学探矿工作中是适用的。此法测定钼含量的范围为1至40ppm,对分析步骤稍作更动,可使测定范围增加至400ppm,如果需要尚可增至4000ppm。尚未试验本法是否适用於测定岩石中的微量钼。
This article describes the geochemical field method for the determination of trace molybdenum in soils. Soil samples with sulfuric acid and nitric acid mixture leaching, instead of carbonate - nitrate melting method. Organic substances, copper and various other disturbances and the conditions for the determination are discussed, simplifying the analytical procedure and determining the molybdenum directly in the extract using potassium thiocyanate. The entire operation is carried out in test tubes and a three-person panel can make about 150 determinations per day. Compared with the laboratory method, it is proved that this method is suitable for geochemical prospecting. This method for the determination of molybdenum content in the range of 1 to 40ppm, the analysis steps a little change, the measurement range can be increased to 400ppm, if necessary, can still be increased to 4000ppm. It has not been tested whether this method is suitable for the determination of trace molybdenum in rocks.