摘要
提出了用ＰＭＢＰ－萃淋树脂柱色谱萃取、甲酸洗脱分离稀土，在ＫＣｌ介质中用偶氮胂Ⅲ显色剂光度法测定磷肥中稀土总量的方法。对三种磷肥试样测定的统计结果表明，本方法标准偏差（ＳＤ）小于１．６％、相对标准偏差（ＲＳＤ）小于７％。与ＰＭＢＰ－苯溶剂萃取光度法测定结果相比，相对误差小于３％。本法用于磷肥中稀土总量测定，具有结果可靠、无环境污染、易于推广的优点。
In this paper, it has been reported that the total rare earthsin phosphate fertilier, which is extracted by CL-PMBP column chromatography and washed off by formic acid, is determined by spectrophotometry with arsenazo Ⅲ in the presence of KCl. For each of threesamples, the statistical results show that the standard deviation is lessthan 1.6% and the RSD is less than 7%. Comparing with the results measured by PMBP-benzene solvent extraction spectrophotometry, the relat ive error is less than 3%.
出处
《稀有金属与硬质合金》
CAS
CSCD
1996年第1期29-33,共5页
Rare Metals and Cemented Carbides
关键词
稀土
萃取柱色谱
光度法
磷肥
rare earth, extraction column chromatography, spectrophotometry, phosphate fertilizer
