稀土树脂相分光光度法研究

在HCl—KCl(pH0.5)介质中,稀土—三溴偶氮胂二元络合物能较好地被阴离子交换树脂吸附。RE_2O_8在0～8μg/25ml范围内符合比尔定律,以双波长等吸收点法(测量波长λ_1=650nm,参比波长λ_2=740nm)扣除树脂背景影响,应用于稀土矿中稀土总量测定,结果令人满意。

Study on the Resin Phase Spectrophotometry for Determination of Rare Earth

In the medium of HC1 - KC1 (pH 0.5) , the rare earth forms binary complex with tribromoar'senazo ( TBA ) , which can be adsorbed by the strong basic anion resin and the resin phase can be used to determine the total amount of rare earth elements in the rare earth minerals directly by dual wavelength equiabsorption method ( measurement wavelength 650 nm, reference wavelength 740 nm) . The analytical results are Satisfactory. Beer's law is obeyed in the range of 0-8ug/25ml for rare earth.