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在pH4.5的弱酸介质中,钇与对氯偶氮氯膦形成1:1的β型络合物,其最大吸收波长和表观摩尔吸光系数分别为746nm和1.56×10~5。方法用于钴基合金中微量钇的测定,结果满意。
In pH4.5 weak acid medium, yttrium and p-chloro-chlorophosphonazo form a 1: 1 β-type complex with the maximum absorption wavelength and apparent molar absorptivity of 746 nm and 1.56 × 10 -5, respectively. The method was applied to the determination of trace yttrium in cobalt-based alloys with satisfactory results.