树脂相分光光度法测定粮食中的钴  

Solid-phase spectrophotometric determination of cobalt in grain

作　　者：赵桦萍[1] 肖忠峰[2] 赵丽杰[1] 

机构地区：[1]齐齐哈尔大学化学化工学院,黑龙江齐齐哈尔161006 [2]滨州学院化学与化工系,滨州256603

出　　处：《粮油食品科技》2006年第6期49-50,共2页Science and Technology of Cereals,Oils and Foods

摘　　要：以β-环糊精和环氧氯丙烷为原料合成了环糊精聚合树脂，将其作为显色剂2-[5-溴-2-吡啶偶氯]-5-二乙氨基苯酚的我体，采用β-环糊精-2-（5-溴-2-吡啶偶氮]-5-二乙氨基苯酚树脂相分光光度法测定微量钴。配合物的最大吸收波长为590nm，表观摩尔吸光系数为3．76×10^5L·mol^-1·cm^-1，钴含量在0～12μg范围内服从比尔定律，线性回归方程Y=0．0013＋0．1275x，相关系数r=0．9994，加标回收率为98．3％～101．3％。β-cyclodextrinpolymer（β-CDP） was synthesized using epichlorohydrin as the cross-link agent. It has been used as a carrier of 2 - [ 5 - bromo - （2 - pyridylazo）） - 5 - diethylaminophenol. Solid-phase spectrophotometric method with β - cyclodextrinpolymer and 5 - Br - PADAP for determination of trace cobalt. The maximum absorbance is at 590 nm with apparent molar absorption of 3.76×10^5L·mol^-1·cm^-1. The Beer＇ s law is obeyed in the range of 0 - 12μg cobalt content. The regression equation of calibration isy = 0. 0013 ＋ 0.1275x with a correlation coefficient of 0.9994 and the rate of recovery is 98.3 - 101.3%.

关 键 词：环糊精交联聚合物 树脂相分光光度法 钴 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚 

分 类 号：O657.32[理学—分析化学]