论文部分内容阅读
在微酸性溶液中钪与甘氨酸邻甲酚红(GCR)和溴化十六烷基三甲铵(CTMAB)形成红紫色的三元络合物。在其最大吸收波长540nm处的表观摩尔吸光系数为4.14×10~4。三元络合物的络合比为SC:GCR:CTMAB=1:2:2。当以乙酰丙酮及邻菲啰啉为联合掩蔽剂时,大量稀土元素及10余种共存元素不干扰钪的测定。用本法测定了合成的混合稀土样品中的少量钪,得到了较满意的结果。
In a slightly acidic solution, scandium forms a magenta ternary complex with glycine o-cresol red (GCR) and cetyltrimethylammonium bromide (CTMAB). The apparent molar absorptivity at its maximum absorption wavelength of 540 nm is 4.14 × 10 ~ 4. The complex ratio of the ternary complex is SC: GCR: CTMAB = 1: 2: 2. When combined with acetylacetone and phenanthroline as masking agent, a large number of rare earth elements and more than 10 kinds of coexisting elements do not interfere with the determination of scandium. By this method, a small amount of scandium in the synthesized mixed rare earth samples was measured, and satisfactory results were obtained.