文献类型：期刊文献

英文题名：Development of on-line spectroscopic determination approach of dispersive liquid-liquid microextraction based on an effective device

作者：Li, Wei;Zhang, Xuan;Tong, Peijin;Wu, Ting;Hu, Huilian;Wang, Meng;Du, Yiping[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2014

卷号：124

起止页码：159

外文期刊名：SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

收录：;EI(收录号：20140617274320);WOS:【SCI-EXPANDED(收录号:WOS:000334130500023)】；

基金：This work was supported by Science and Technology Commission of Shanghai Municipality (13142201200).

语种：英文

外文关键词：Dispersive liquid-liquid microextraction; On-line determination; Low-density solvent; Rhodamine B; Quantitative analysis

摘要：A novel, rapid, simple, and low-cost on-line determination approach of dispersive liquid-liquid microextraction (DLLME) with low-density solvents was developed with the support of a specially designed effective homemade device. The proposed method surmounted the drawbacks of conventional DLLME of the need of high-density solvents as extractants, and the requirement of centrifugation operation to obtain phase separation, and the difficulties to realize on-line determination. The amount of sample utilized can conveniently change according to practical needs by varying the volume of the extraction tube of the device to perform a more effective DLLME. A case study was carried out to assess this method utilizing the dye rhodamine B as the model analyte. The experiment parameters influencing the extraction were systematically investigated. Under optimum conditions, the linearity was obtained in the range of 0.015-1.000 mu g/mL with the correlation coefficient (r(2)) of 0.9980. The limit of detection and quantification were 6.1 and 20.4 mu g/L, respectively. Good repeatability was achieved with the relative standard deviations (RSD) for five replicate measurements of different concentration samples less than 4.06%, and the presented method was successfully employed to quantify rhodamine 13 in three real samples. (C) 2014 Elsevier B.V. All rights reserved.