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冶金地质化探痕量分析要求铍的测定灵敏度达1ppm,过去采用的铍试剂Ⅱ、铍试剂Ⅲ、铬天青S等方法均达不到这样高的灵敏度。应用阳离子表面活性剂的羊毛铬花菁R(ECR)法具有很高的灵敏度,但氟干扰严重。而氟在岩石中的克拉克值高达660ppm,土壤中亦有200ppm。当试样中硅高时加入溴化十六烷基吡啶(CPB)后析出大量沉淀,无法比色。因此,我们在该法的基础上,就干扰元素的消除进行了实验。铝能有效的掩蔽氟,在加热的情况下多余的铝被EDTA稳定地络合,从而消除了氟与铝的干扰。硅用氢氟酸挥散除去。经标准加料回收试验和试
Metallurgical geochemical exploration trace analysis requires the determination of beryllium sensitivity of 1ppm, past the beryllium reagent Ⅱ, beryllium reagent Ⅲ, chrome Azure S and other methods are not up to such a high sensitivity. The wool chrysin R (ECR) method using cationic surfactants has high sensitivity, but the fluorine interference is serious. The fluorine in the rock Clarke value as high as 660ppm, soil also has 200ppm. When the sample is high in silicon by adding cetyl pyridinium bromide (CPB) precipitated a large number of precipitation, can not be colorimetric. Therefore, on the basis of the law, we have experimented with the disruption of interference elements. Aluminum can effectively mask the fluorine, and the excess aluminum is stably complexed with EDTA under heating, thereby eliminating the interference of fluorine with aluminum. Silicon with hydrofluoric acid volatile removal. Standard feeding test and recycle