Determination of phenols in sea water by liquid chromatography with electrochemical detection after enrichment by using solid-phase extraction cartridges and disks

✍ Scribed by M.Teresa Galceran; Olga Jáuregui

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 770 KB
• Volume: 304
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(94)00567-6

✦ Synopsis

The efficiency and the reproducibility of different solid-phase adsorbents such as C,, cartridges, C,, and poly(styrenedivinylbenzene) (PS-DVB) membrane extraction disks were evaluated for the extraction of phenols from water at pg I ' concentration levels. Liquid chromatography with electrochemical detection (LC-ED) was used for the analysis of the organic extracts. A phosphate buffer-acetonitrile-methanol mixture as mobile phase and coulometric detection at + 750 mV were used. High recoveries (70-98%) and good reproducibility (relative standard deviation between 3 and 12%) were obtained using PS-DVB disks, which can be recommended for the enrichment of samples with low concentration of phenols (0.5 pg I-'). For more concentrated samples (10 pg l-'1, the use of C,, cartridges was preferred because smaller solvent and sample volumes were used and the analysis time was reduced.