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铈(Ⅲ)在硫酸、高氯酸、盐酸介质中出现荧光,可以在其他希土离子存在下进行测定。本文针对地质试样观察了32种金属成分允许存在量。铁(Ⅲ)、铬(Ⅲ)导致荧光熄灭,用盐酸羟胺还原;铊(Ⅰ)用铝片还原;铂(Ⅳ)在处理矿样过程中转化成硫酸络合物消除干扰。本法取毫克量试样经处理后,直接测定钛铁矿中铈;并对GSD系列试样中铈做了测定,结果相符。二氧化铈线性动态范围在5至800ppb可用。 实 验 部 分
Cerium (III) fluorescence in sulfuric acid, perchloric acid, hydrochloric acid medium, can be measured in the presence of other rare earth ions. In this paper, we observed the allowable amount of 32 kinds of metal components for geological samples. Iron (Ⅲ) and chromium (Ⅲ) led to quenching of fluorescence and reduction with hydroxylamine hydrochloride; thallium (I) was reduced with aluminum flake; and platinum (Ⅳ) was converted into sulfuric acid complex to eliminate interference during the processing of ore samples. This method take a milligram amount of sample after treatment, direct determination of ilmenite in cerium; and GSD series of samples of cerium was determined, the results are consistent. The ceria linear dynamic range is available at 5 to 800 ppb. Experimental part