文献类型：期刊文献

英文题名：Multilayer and multichannel membrane filtration for separation and preconcentration of trace analytes and its application in spectral analysis

作者：Li, Wei[1];Wang, Haiting[2];Jiang, Wei[2];Wang, Lei[1];Zhang, Ruoqiu[1];Li, Hui[3];Wu, Ting[1];Du, Yiping[1]

机构：[1]E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]Shanghai Entry Exit Inspect & Inspect & Quarantin, Tech Ctr Ind Prod & Raw Mat Inspect & Testing, Shanghai 200135, Peoples R China;[3]Dehong Teachers Coll, Dept Sci & Engn, Mangshi 678400, Peoples R China

年份：2016

卷号：8

期号：1

起止页码：129

外文期刊名：ANALYTICAL METHODS

收录：;EI(收录号：20160101763899);WOS:【SCI-EXPANDED(收录号:WOS:000366905700017)】；

基金：This study was supported by the Shanghai Inspection & Inspection and Quarantine Bureau (HK012-2015).

语种：英文

外文关键词：Extraction - Phase separation - Citrus fruits - Spectrum analysis - Multilayers - Rhodium compounds

摘要：Membrane filtration (microfiltration) as a solid-phase extraction technique with features of rapidity, simplicity of operation, low cost, and high enrichment efficiency has received considerable attention and has been widely used for separating and enriching analytes from fluids. On the basis of our previous study, a very simple but effective mode of multilayer membrane filtration-enrichment process was introduced into the case of quantitative detecting of two or more analytes in mixture samples to achieve the target of separating and concentrating analytes simultaneously. A case study was carried out to assess this method utilizing the carcinogenic dyes rhodamine B (RhB) and acid orange 7 as model analytes. Under the optimal conditions, linearity of the calibration curve based on the Kubelka-Munk function was achieved in the concentration range of 3-30 mg L-1 with the correlation coefficients (R-2) of 0.9982 and 0.9952 for RhB and acid orange 7, respectively. Good repeatability was achieved utilizing 30, 10 and 5 mg L-1 solutions with the relative standard deviations (RSDs) of 3.1-6.4% for RhB and 2.4-5.8% for acid orange 7. The presented method was successfully employed to simultaneously quantify RhB and acid orange 7 in soft drink and candy samples.