研究了 EDTA容量法测定镝铁合金中稀土总量.采用氟化分离消除铁对滴定的干扰.进行了加料回收和精密度实验,回收率在 99%~101%之间,RSD<1%,被分析元素的测定范围在70%~90%.对容量法测定镝铁合金中稀土总量的研究结果令人满意.
EDTA volume method was used to determine total rare earth contents in Dy-Fe alloy.Iron interference was eliminated by the addition of fluoride ions.Recovery in 99%~101% and RSD less than 1% were obtained.This method is accurate.
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