A comparison of the performance of two chromatographic and three extraction techniques for the analysis of PAHs in sources of drinking water

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Abstract

The aim of this work is to establish a sensitive and reliable method for the analysis of the 16 priority Environmental Protection Agency-defined polycyclic aromatic hydrocarbons (PAHs) found in water samples. Gas chromatography (GC)-mass spectrometry (MS) and high-performance liquid chromatography (HPLC)-fluorescence detection (FLD)-UV techniques are optimized to obtain an adequate resolution of all compounds. Validation of the methods is carried out, and a good performance is observed for both techniques. The HPLC-FLD-UV technique is somewhat more sensitive than the GC-MS technique for the determination of PAHs; thus, the HPLC-FLD-UV method is used to follow up both the solid-phase extraction (SPE) analysis using cartridges and discs and the liquid-liquid extraction (LLE), which are also evaluated for the extraction of the PAHs. Low recoveries between 43% and 79% are obtained using SPE cartridges, and higher values are obtained using SPE discs (56-96%) and LLE (60-105%). Better results are obtained using the LLE technique, and, thus, analysis of real water samples is carried out using this technique. LODs between 0.6 and 21 ng/L and relative standard deviations less than 15% are obtained using a spiked water sample analyzed using the full LLE HPLC-FLD-UV method.

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Díaz-Moroles, N. E., Garza-Ulloa, H. J., Castro-Ríos, R., Ramírez-Villarreal, E. G., Barbarín-Castillo, J. M., Salazar-Cavazos, M. D. L. L., & Torres, N. W. D. (2007). A comparison of the performance of two chromatographic and three extraction techniques for the analysis of PAHs in sources of drinking water. Journal of Chromatographic Science, 45(2), 57–62. https://doi.org/10.1093/chromsci/45.2.57

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