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Determination of four aromatic amines in water samples using dispersive liquid–liquid microextraction combined with HPLC by Xuedong Wang; Lingyan Fu; Guohui Wei; Jia Hu; Xinna Zhao; Xiujuan Liu; Yanyan Li is a Chemistry article available to read on EtoBox.

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## Abstract A new method for the determination of four aromatic amines in water samples was developed by using dispersive liquid–liquid microextraction (DLLME) technique combined with HPLC‐variable wavelength detection (HPLC‐VWD). In this extraction method, 0.50 mL methanol (as dispersive solvent) containing 25.0 μL tetrachloroethane (as extraction solvent) was rapidly injected by a syringe into 5.00 mL water sample. Accordingly, a cloudy solution was formed. After centrifugation for 2 min at 4000 rpm, the fine droplets of the tetrachloroethane containing the analytes were sedimented in the bottom of the conical test tube (7 ± 0.2 μL). Then, 5.0 μL of the settled phase was determined by HPLC‐VWD. Parameters such as the kind and volume of extraction solvent and dispersive solvent, extraction time, and salt concentration were optimized. Under the optimum conditions, the enrichment factors ranged from 41.3 to 94.5. Linearity was observed in the range of 5–5000 ng/mL. The LODs based on S/N of 3 ranged from 0.8 to 1.8 ng/mL. The RSDs (for 400 ng/mL of __p__‐toluidine and __o__‐chloroaniline, 100 ng/mL of __p__‐chloroaniline and __p__‐bromoaniline) varied from 4.1 to 5.3% (__n__ = 6). Th

Who reads Determination of four aromatic amines in water samples using dispersive liquid–liquid microextraction combined with HPLC?

Author

Xuedong Wang; Lingyan Fu; Guohui Wei; Jia Hu; Xinna Zhao; Xiujuan Liu; Yanyan Li

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1615-9306)

Published

2008

Language

EN

Field

Chemistry (Physical Sciences)