Abstract：In HAc-NaAc buffer solution at pH 6.0, eriochromocyanine R （ECR） could react with scandium （Ⅲ） to form a stable complex （molar ratio of 2∶1） in the presence of cetylpyridine bromide （CPB） and emulsifier OP. This complex was extracted and enriched with 717 anion resin exchange column. The scandium in resin phase was determined by spectrophotometry. Consequently, a new spectrophotometric determination method of scandium was established. The maximum absorption wavelength of this adsorptive complex resin was 600 nm, and the apparent molar absorptivity was 2.03×105 L·mol-1·cm-1. Beer's law was obeyed for scandium in the range of 0-200 μg/L. After extraction enrichment with anion resin exchange column, the determination sensitivity of scandium could be enhanced by several times. Most common ions did not interfere in the determination. The proposed method was applied to the determination of trace scandium in red mud of aluminium plant. The relative standard deviation （RSD） was less than 2 %, and the recoveries of standard addition were 98 %-102 %. The determination results were consistent with those obtained by ICP-AES.
马淞江，罗道成*. 阴离子树脂萃取富集-埃铬青R光度法测定赤泥中痕量钪[J]. 冶金分析, 2011, 31(8): 40-43.
MA Song-jiang，LUO Dao-cheng*. Spectrophotometric determination of trace scandium in red mud using eriochrome cyanine R after extraction enrichment with anion resin. , 2011, 31(8): 40-43.
