偶氮氯膦PN(CPA-PN)光度法测定氧化铝废渣中的微量钪  

Determination of Micro Scandium in Alumina Waste Residue by Using PN(CPA-PN) Spectrophotometric Method

作　　者：林筑 郑美娟 安莎 何锦林 

机构地区：[1]贵州省分析测试研究院,贵州贵阳550002

出　　处：《广东化工》2017年第5期172-173,共2页Guangdong Chemical Industry

基　　金：食品安全管理服务平台的研发及应用示范(贵州省院合作专项)

摘　　要：采用偶氮氯膦PN(CPA-PN)显色,在低酸度介质用强酸型树脂Dowex50W-X8吸附钪与干扰元素分离,用2 mol/L HCL洗提干扰元素,用5 mol/L HCL洗脱钪,再用0.01 mol/L PMBP-苯萃取,用1%甲酸洗有机相出去稀土元素,用1 mol HCL反萃取钪。实验结果表明,钪含量在0~12μg/mL范围内符合比尔定律,络合物的最大吸收波长680 nm,表观摩尔吸光系数为9.00×10~2,钪校准曲线的R^2=0.9979。对于铝废渣试样进行分析,相对标准偏差2.3%,加标回收率为99%。The paper presented the experiment of adsorbing scandium and separating interfering elements with anion Dowex 50 Wx8 in low acidity medium. Interfering elements were extracted with 2 mol/L HCL firstly in the experiment, followed by scandium eluting with 5 mol/L HCL. Benzene extraction was performed using 0.01 mol/L PMBP afterwards. After rare earth elements removal through treating organic phase with 1% formic acid, scandium was back extracted with lmol HCL CPA-PN colorimetric method was carried out in the end of the experiment.The experiment result showed that scandium content is in the range of 0-12 g/mL, which is in accordance with the Bill＇s Law. The maximum absorption wavelength of complexes is 680 nm, coefficient of the apparent molar absorption is 9.00~102. The calibration curve of scandium （R2） is 0.9979. Analysis of the alumina waste residue samples showed a relative standard deviation of 2.3 %. And the recovery rate reached 99 %.

关 键 词：钪 铝废渣 偶氮氯膦PN(CPA-PN)显色 分光光度法 

分 类 号：O65[理学—分析化学]