Electrochemical studies of determination of Basic Brown G and its interaction with cyclodextrins
Electrochemical studies of determination of Basic Brown G and its interaction with cyclodextrins
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DOI：
10.1016/j.dyepig.2006.01.012
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发表时间：
2007
影响因子：
4.5
通讯作者：
You-Qin Li;Yu-jing Guo;Xiuokai Li;Jing-hao Pan
中科院分区：
文献类型：
--
作者：
You-Qin Li;Yu-jing Guo;Xiuokai Li;Jing-hao Pan
本文采用极谱法和伏安法，建立了一种简便、快速、灵敏、准确的碱性棕G （BBG）电分析方法。在氨-氯化铵（pH 9.1）中，利用线性扫描伏安法（LSV）发现了BBG的二阶导数还原峰（ip″）。峰值电位（Ep）约为- 0.67V（相对于SCE）。峰值电流（ip″）与BBG浓度在3.0×10−8-1.0×10−4molL−1范围内成正比（r= 0.9935-0.9987），检出限（LOD）为9.0×10−9molL−1。BBG的回收率为95.3 ~ 102%，相对标准偏差（RSD）为2.4% （n=10）。该方法有望实现染料工业废水中残留染料浓度的测定。此外，还研究了BBG与环糊精（CDs）的超分子体系。BBG分别与α-CD和HP-α-CD形成1:2 （BBG:CD）包合物，与其他6种CD形成1:1包合物。计算了不同种类cd的包合常数，比较了不同种类cd的包合能力，并对包合机理进行了初步探讨，为BBG和cd的进一步应用提供了有价值的信息。
In this paper, a simple, rapid, sensitive and accurate electroanalytical method of Basic Brown G (BBG) has been established by polarography and voltammetry. In ammonia–ammonium chloride (pH 9.1), a sensitive second derivative reduction peak (ip″) of BBG was found by Linear Sweep Voltammetry (LSV). The peak potential (Ep) is about −0.67V (versus SCE). The peak current (ip″) is proportional to the concentration of BBG over the range 3.0×10−8–1.0×10−4molL−1(r=0.9935–0.9987) and the limit of detection (LOD) is 9.0×10−9molL−1. The recovery of BBG varied from 95.3 to 102% and the relative standard deviation (RSD) was 2.4% (n=10). The method has been expected to achieve the determination of the concentration of remnants of dyes of wastewater in dye industry. In addition, the supramolecular system of BBG with cyclodextrins (CDs) has been studied. BBG can form 1:2 (BBG:CD) inclusion complex with α-CD and HP-α-CD, respectively, and 1:1 inclusion complex with other six CDs. The inclusion constants were calculated and the inclusion ability of different kinds of CDs was compared, furthermore, the inclusion mechanism is also preliminarily discussed, which provided some valuable information for further application of BBG and CDs.