硫代苹果酸功能化的纳米银分光光度法测定面制食品中铝含量  

Spectrophotometric Determination of Aluminum in Flour Foods with Silver Nanoparticles Functionalized by Thiomalic Acid

作　　者：潘风美[1] 赵艳芳[1,2] 路普亮 孔繁蕾 PAN Fengmei;ZHAO Yanfang;LU Puliang;KONG Fanlei(College of Chemistry and Pharmaceutical Sciences,Qingdao Agricultural University,Qingdao 266109,China;Jiangsu Agro-Hormone Engineering Technology Research Center,Changzhou 213022,China;Qingdao Zhongwei Safety Inspection Co.,Ltd.,Qingdao 266111,China)

机构地区：[1]青岛农业大学化学与药学院,青岛266109 [2]江苏省农用激素工程技术研究中心,常州213022 [3]青岛中维安全检测有限公司,青岛266111

出　　处：《理化检验（化学分册）》2019年第11期1261-1265,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金(21505083);青岛农业大学实验技术项目(SYJK19-19)

摘　　要：制备了硫代苹果酸功能化的银纳米颗粒(TMA-AgNPs),随着Al3+浓度的增加,TMAAgNPs上的功能基团与Al3+发生相互作用导致TMA-AgNPs的聚集,溶液颜色由黄色逐渐变为橘红色,据此采用分光光度法测定面制食品中铝含量。优化的试验条件如下:①5.0mmol·L^-1硫代苹果酸溶液的用量为2mL;②修饰反应时间为10min;③Al3+与TMA-AgNPs的作用时间为2min。Al3+的线性范围为0.10~5.00μmol·L^-1,检出限(3S/N)为0.031μmol·L^-1。方法用于面制食品样品的分析,加标回收率为97.0%~105%,测定值的相对标准偏差(n=5)为2.1%~3.1%。Silver nanoparticles(TMA-AgNPs)functionalized by thiomalic acid were prepared.The interaction between the functional groups of the TMA-AgNPs and Al3 +resulted in the aggregation of TMA-AgNPs accompanied by a color change from yellow to orange with increase of Al3 +ion concentration.Based on this fact,spectrophotometry was applied to the determination of aluminum in flour foods.The optimized conditions found were as follows:① amount of 5.0 mmol·L^-1 thiomalic acid solution was 2 mL;② modification reaction time was10 min;③ interaction time of Al3 +and TMA-AgNPs was 2 min.Linearity range of Al3 +was found between0.10μmol·L^-1 and 5.00μmol·L^-1 with detection limit(3 S/N)of 0.031μmol·L^-1.The proposed method was applied to the analysis of samples of flour foods,giving values of recovery found by standard addition method and RSDs(n=5)of determined values in the ranges of 97.0%-105% and 2.1%-3.1%respectively.

关 键 词：分光光度法 硫代苹果酸 纳米银 面制食品 铝 

分 类 号：O657.32[理学—分析化学]