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上海师大去年新合成了一种高灵敏的稀土显色剂偶氮氯膦-mA,化学名为2-(4-氯-2-膦酸基苯偶氮)-7-(3-乙酰苯偶氮)-1,8二羟基-3,6-萘二磺酸,简称CPA-mA。它在酸性介质中能与稀土形成稳定的蓝紫色4:1络合物,并以磷酸-草酸-焦磷酸钾为隐蔽剂不经分离应用于球墨铸铁中稀土总量的测定。但能否直接用于组份较复杂的矿石分析中尚未见有报导。为此,我们除进行显色条件试验外,并针对岩矿中常见伴生元素存在的情况用混合提取剂在
Last year, Shanghai Normal University newly synthesized a highly sensitive rare earth chromophore chlorophosphonazo-mA, chemically named 2- (4-chloro-2-phosphonophenylazo) -7- (3- Azo) -1,8 dihydroxy-3,6-naphthalene disulfonic acid, abbreviated CPA-mA. It can form a stable blue-violet 4: 1 complex with rare earth in acid medium and can be used to determine the total amount of rare earth in nodular cast iron without using phosphate-oxalic acid-potassium pyrophosphate as concealment agent. However, it has not been reported whether it can be applied directly to the more complex ore analysis. To this end, we in addition to the conditions of color test, and rock associated with common elements in the presence of mixed extractant