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对兴多偶氮氯膦是一种新颖的希土总量显色剂,它不但具有较高的灵敏度(ε_(665)~(Ce)=7.2×10~4)和较好的选择性,而且在测定条件下(HNO_3-H_2C_2O_4-EDTA体系)对各个别希土的吸光度值接近,可适用于以轻和重希土为主的各种希土样品。这对各种不同来源的希土矿样及含不同比例的轻重混合希土样品可用同一条检量线进行测定。本文拟订的测定希土总量的方法,操作简便、准确,对各类不同轻重希土含量的组成矿样及球铁标样分析结果甚为满意。
It is not only a high sensitivity (ε_ (665) ~ (Ce) = 7.2 × 10 ~ 4) and better selectivity to chlorhexidine chlorophosphonates, In addition, the absorbance values of each individual soil were similar under the conditions of measurement (HNO 3 -H 2 C 2 O 4-EDTA system) and could be applied to various samples of rare earths, mainly light and heavy re-soil. This for a variety of different sources of rare earth mineral samples and mixed with different proportions of light and rare earth samples can be used to determine the same line. The method for determining the total amount of rare earths prepared in this paper is simple and accurate. It is very satisfied with the compositional samples of various light and heavy rare earth elements and the standard samples of ductile iron.