Abstract
A novel, efficient, and environmentally friendly method—supramolecular solvent liquid–liquid microextraction (SMS-LLME) combined with high-performance liquid chromatography (HPLC)—was first established for the determination of p-nitrophenol and o-nitrophenol in water samples. Several important parameters influencing extraction efficiency, such as the type and volume of extraction solvent, pH of sample, temperature, salt effect, extraction time, and stirring rate, were optimized in detail. Under the optimal conditions, the enrichment factor was 166 for p-nitrophenol and 160 for o-nitrophenol, and the limits of detection by HPLC were 0.26 and 0.58 μg L−1, respectively. Excellent linearity with coefficients of correlation from 0.9996 to 0.9997 was observed in the concentration range of 2–1,000 μg L−1. The ranges of intra- and interday precision (n = 5) at 100 μg L−1 of nitrophenols were 5.85–7.76 and 10.2–11.9 %, respectively. The SMS-LLME method was successfully applied for preconcentration of nitrophenols in environmental water samples.
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This work was supported by the National Natural Science Foundation of China (No. 21175155) and Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education (Central South University).
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Yang, Q., Chen, X. & Jiang, X. Liquid–Liquid Microextraction of Nitrophenols Using Supramolecular Solvent and Their Determination by HPLC with UV Detection. Chromatographia 76, 1641–1647 (2013). https://doi.org/10.1007/s10337-013-2554-z
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DOI: https://doi.org/10.1007/s10337-013-2554-z