化学学报 ›› 1963, Vol. 29 ›› Issue (3): 223-226. 上一篇    

研究简报

二甲酚橙在比色分析的应用——Ⅰ.少量鈧的测定

龔美菱   

  1. 陕西省冶金工业局地质公司中心化验室
  • 收稿日期:1962-05-31 出版日期:1963-06-15 发布日期:2013-06-03

APPLICATION OF THE XYLENOL ORANGE IN COLORIMETRIC ANALYSIS Ⅰ. COLORIMETRIC DETERMINATION OF SMALL AMOUNTS OF SCANDIUM

GONG MEI-LING   

  1. The Central Laboratory of Geological Enterprise, Bureau of Metallurgical Industries, Shensi
  • Received:1962-05-31 Online:1963-06-15 Published:2013-06-03

本文报告以二甲酚橙作显色剂此色法測定鈧的条件,最好的pH区域为2.2—2.45,在此条件下,絡合物在波长560毫微米附近有最大吸收波峯。絡合物中[試剂]:[鈧]=1:1。当試样中有釷时,采取同一溶液用鈍試剂測定釷的含量,并根据試驗結果,換算为相当量的鈧,并減去之。

The stable purple-red complex of xylenol orange and scandium (Ⅲ) can be utilized for colorimetric determination of scandium. It is found that the solution should adjusted to pH 2.2-2.45. Optical density should be measured at 560 mμ where the maximum absorption of the complex occurs. Small amounts of trivalent rare earth metals, iron(Ⅲ), manganese(Ⅱ), and aluminum do not interfere, while sulfate, phosphate, fluoride, oxalate, thiourea, ascorbic acid, and nitrilotriacetic acid interfere seriously. Among reductants studied, thioglycolic acid interfere the least. The interference due to thorium can be eliminated by determining thorium separately and then deduce From the sum of thorium and scandium (100μg of thorium corresponds to 41μg of scandium oxide in the xylenol orange determination).