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矿石中微量铂钯的分析,无论采用湿法或试金进行富集,在测定时一般采用氯仿-石油醚来萃取铂把与DDO(双十二烷基二硫代乙二酸二胺)形成的有色络合物的比色方法。由于石油醚供应不正常,为了完成铂钯的分析任务,通过多次实验,最后找到了无色汽油来代替石油醚。实验表明,它不但完全能代替石油醚,而且还有以下优点;1.价格便宜(石油醚较无色汽油约贵七倍)。2.来源广泛,各地石油门市部可购到。3.DDO与铂钯形成的络合物在此溶剂中十分稳定。4.由于无色汽油沸点比石油醚高,气温高时(25℃以上)萃取振荡中体积膨胀而引起的操作
Trace platinum and palladium ore analysis, whether using wet or gold assay enrichment, the determination of the general use of chloroform - petroleum ether to extract the platinum and DDO (dilauryl dithio oxalate diamine) formed Colorimetric methods for colored complexes. Due to the abnormal supply of petroleum ether, in order to complete the task of platinum and palladium analysis, through several experiments, finally found a colorless gasoline instead of petroleum ether. Experiments show that it can not only completely replace petroleum ether, but also has the following advantages; 1. Cheap (petroleum ether is about seven times more expensive than colorless gasoline). 2. A wide range of sources, around the oil shops available. 3.DOO and platinum palladium complex formed in this solvent is very stable. 4 due to colorless gasoline boiling point higher than petroleum ether, the high temperature (25 ℃) extraction oscillation volume expansion caused by the operation