论文信息 - Evaluation of extraction alternatives for Fourier transform infrared spectrometric determination of oil and greases in water

Evaluation of extraction alternatives for Fourier transform infrared spectrometric determination of oil and greases in water

Abstract Liquid-liquid extraction (LLE), solid phase extraction (SPE) and microwave-assisted extraction are evaluated for Fourier transform infrared (FTIR) spectrometric determination of oil and grease in polluted waters. A fast microwave-assisted quantitative procedure is proposed for the total extraction of oil and grease into CCl 4 from water samples, with an irradiation time of 1 min at an exit power of 520 W using closed PTFE vessels. The FTIR quantification of oil and grease is carried out by the measurement of the area under the absorbance spectra in the range between 3058 and 2780 cm −1 , with a baseline established between 3200 and 2700 cm −1 . The analytical features of the proposed method and those of LLE-FTIR spectrometry are evaluated and samples spiked with different types of oils examined. Additionally a SPE-FTIR procedure has been evaluated and results obtained compared with those found by SPE-gravimetric analysis for a series of synthetic and real samples.

[1] S. Garrigues,et al. Flow injection–Fourier transform infrared spectrometric determination of oil and greases: preliminary microwave-assisted extraction studies , 1996 .

[2] S. Garrigues,et al. On-line preconcentration and flow analysis–Fourier transform infrared determination of carbaryl , 1994 .

[3] A. E. Greenberg,et al. Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[4] H. Kingston,et al. Introduction to microwave sample preparation: theory and practice , 1988 .

[5] C. Headington,et al. Infrared Spectrophotometric Determination of Oil and Phenols in Water , 1951 .

[6] S. Garrigues,et al. Solid phase preconcentration-Fourier transform infrared spectrometric determination of carbaryl and 1-naphthol , 1995 .

[7] J. Markham. Introduction to microwave sample preparation: Edited by H. M. Kingston and Lois B. Jassie. American Chemical Society, Washington, D.C., 1988. xxii + 263 pp., $49.95 (U.S. and Canada), $59.95 (Export) , 1990 .

[8] V. Lopez-Avila,et al. Microwave-Assisted Extraction of Organic Compounds from Standard Reference Soils and Sediments , 1994 .

[9] M. Wells,et al. Determination of oil and grease in waste water by solid-phase extraction , 1995 .