功能性马丙共聚物树脂富集-分光光度法测定痕量铁(Ⅲ)  

Determination of Trace Iron (Ⅲ) after Preconcentration with Functional Anhydride-acrylamide Copolymer Resin by Spectrophotometry

作　　者：王海力[1] 党高潮[1] 谢志海[1] 蔡清[1] 刘宇[1] 王玲燕[1] 

机构地区：[1]西北大学合成与天然功能分子化学教育部重点实验室、化学与材料科学学院,陕西西安710069

出　　处：《分析科学学报》2013年第5期669-672,共4页Journal of Analytical Science

基　　金：陕西省科技厅成果推广项目(No.2010TG-40)

摘　　要：建立了功能性马来酸酐、丙烯酰胺共聚物树脂P(MA-AM)富集-分光光度法测定痕量Fe(Ⅲ)的新方法。考察了树脂对痕量Fe(Ⅲ)的吸附、洗脱行为。结果表明,在pH=3.5时,P(MA-AM)能富集Fe(Ⅲ),吸附30min时,最大吸附率达98.7%;以3.0mol/L的HCl作为洗脱液,Fe(Ⅲ)的回收率为96.2%;富集倍数可达20倍。该方法的检出限为0.02mg/L,相对标准偏差为3.0%,回收率范围为93.3%～97.6%。方法可应用于实际样品中痕量Fe(Ⅲ)的测定。A new method for determination of trace iron by spectrometry was developed with preconcentration using functional anhydride-acrylamide copolymer resin. The adsorption and desorption behaviors of Fe（ Ⅲ） on resin were investigated. The experimental results indicated that P（MA-AM） could concentrate Fe （Ⅲ） at pH 3. 5, the maximum adsorption efficienty was 98. 7% with 30 rain adsorption. The adsorbed Fe（ Ⅲ ） could be desorbed using 3.0 mol/L chloride acid. The recorvery of Fe （Ⅲ） was 96.2% and the enrichment factor can be up to 20 times. The detection limit of the proposed method was 0. 02 rag/L, the relative standard deviation and the recovery were 3. 0% and 93. 3%- 97.6% ,respectively. The established method has been applied to determine trace iron in practical samples with satisfactory results.

关 键 词：功能树脂 富集 铁(Ⅲ) 分光光度法 

分 类 号：O657.31[理学—分析化学]