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研究了新试剂三溴偶氮溴膦 (4 BPA TB)与稀土元素的显色反应。 0 .96mol·L- 1HNO3介质中 ,稀土元素与 4 BPA TB的显色反应灵敏度一致。利用此反应性质 ,测定钢铁中稀土总量获得满意结果
The chromogenic reaction of the new reagent 4 BPA TB with rare earth elements was studied. In 0.96 mol·L-1HNO3 medium, the sensitivities of the chromogenic reaction of rare earth elements and 4 BPA TB were the same. Using this reaction property, the determination of total rare earth in steel obtains satisfactory results