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本文在文献的基础上,应用新显色剂偶氮溴膦-PSN(BPA-PSN)直接光度法快速测定铝基、铜基合金和球墨铸铁中的稀土总量,方法操作简易,快速准确,数据可靠。一、试剂和仪器 BPA-PSN溶液,浓度为0.02％水溶液;铈标准溶液为微酸性,含有5μg/mL CeO_2。 72型分光光度计。二、分析方法 1.铝合金中稀土总量的测定称取试样0.1g于100mL塑料杯中,加3mL HNO_3(1+1)和2 mL HF,摇动溶解后,以3％硼酸溶液稀至刻度,
In this paper, based on the literature, the new chromogenic reagent bromophosphonazo-PSN (BPA-PSN) was used to determine the total amount of rare earths in aluminum-base, copper-base alloy and ductile iron rapidly. The method was simple and rapid, Data is reliable. First, reagents and equipment BPA-PSN solution, the concentration of 0.02% aqueous solution; cerium standard solution is slightly acidic, containing 5μg / mL CeO_2. 72 spectrophotometer. Second, the analysis method 1. Determination of the total amount of rare earth aluminum Weigh the sample 0.1g in 100mL plastic cup, add 3mL HNO3 (1 +1) and 2mL HF, shake to dissolve, dilute to 3% boric acid solution Scale,