茜素应用于识别硼酸的研究  

Recognition of Boric Acid by Alizarin

作　　者：周炳江[1] 朱红华[1] 方克鸣[1] 吴小华[1] 

机构地区：[1]浙江师范大学化学与生命科学学院

出　　处：《光谱实验室》2011年第2期922-926,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：应用紫外-可见分光光度法研究了茜素与硼酸之间的识别行为,结果表明,在pH 9.0Na2HPO4-NaH2PO4缓冲介质中,茜素与硼酸形成1∶1稳定络合物,使茜素的吸收光谱发生明显蓝移,溶液颜色由玫红色变为橙黄色,阴离子F-、Cl-、Br-、I-、Ac-、NO-3、C2O24-等均未引起茜素的吸收光谱及溶液颜色发生明显变化,因此茜素可以选择性识别硼酸。初步探讨了茜素与硼酸之间的相互作用机理,并对茜素识别硼酸与茜素识别阴离子的机理进行了比较。Recognition of boric acid by alizarin was studied by UV-Vis spectrophotometry.The alizarin could form a complex with boric acid at Na2HPO4-NaH2PO4 buffer solution with pH of 9.0.The process induced an obvious blue shift,and the color of the solution turned from rose to orange,yet the addition of anions,such as F-,Cl-,Br-,I-,Ac-,NO-3 and C2O2-4,almost did not course obvious changes for adsorption of alizarin and colour of solution,and alizarin can recognize boric acid.The mechanism of recognizing boric acid with alizarin was discussed preliminarily,and compared with the mechanism of recognizing anions with alizarin.

关 键 词：紫外-可见分光光度法 硼酸 茜素 识别 

分 类 号：O657.32[理学—分析化学]