胶束增溶二阶导数分光光度法同时测定豆粉中Cu、Cd和Zn含量的研究  

Study on simultaneous determination of copper,zinc and cadmium determination of microamount of copper in soya bean milk powder by second-derivative and spectrophoptometry

作　　者：刘欣[1] 王晓鹏[1] 

机构地区：[1]泰山医学院化学与化学工程学院,山东泰安271000

出　　处：《泰山医学院学报》2008年第4期244-247,共4页Journal of Taishan Medical College

摘　　要：目的研究了胶束增溶二阶导数分光光度法同时测定豆粉中的Cu、Cd和Zn含量的实验条件等。方法在pH值为9.2的磷酸氢二钠缓冲溶液体系中,在加入乳化剂OP(聚乙二醇辛基苯基醚)产生胶束增溶作用及显色剂1-(2-吡啶偶氮)-2-萘酚(PAN)的络合作用后,通过二阶导数分光光度法同时测定豆粉中铜、镉和锌时对波长选择、OP用量及体系酸度、温度等的对比。结果方法的检出限为5.5×10-6g/L,仪器精密度测定RSD为0.37%,测定样品后的回收率在95%~102%之间。结论通过二阶导数分光光度法在胶束增溶作用下,铜、镉和锌可以由显色剂所产生的络合作用下被同时测定出来。该方法是可行的,灵敏度较高,结果令人满意。Objective:To research the micellar solubilization second derivative dimultaneous determination of soybean meal in the Cu,Cd and Zn concentrations in the experimental conditions.Methods: At the PH value of 9.2 in the Na2HPO4 buffer system,wity the emulsifier OP(OP) was added to produce micellar solubilization and the complexation of reagent 1-(2-pyridylazo)-2-naphthol(PAN),Simultaneous determinations of the wavelength selection,dosage and OP system acidity,temperature contrast were made in copper,cadmium and...

关 键 词：导数分光光度法 同时测定 胶束增溶 

分 类 号：TS214.2[轻工技术与工程—粮食、油脂及植物蛋白工程]