Istituto di Scienze Chimiche F Bruner, Università di Urbino Carlo Bo, Piazza Rinascimento 6, 61029 Urbino, Italy.
Talanta. 2009 Nov 15;80(1):257-62. doi: 10.1016/j.talanta.2009.06.067. Epub 2009 Jul 4.
Produced formation waters (PFWs) represent the largest aqueous wastes that are normally discharged into the marine environment during the offshore gas production processes. The chemical additive diethylene glycol (DEG) is widely used in the gas production line and therefore can be found in the PFW, becoming of environmental concern. In this study, a new method has been developed for trace determination of DEG in sea water samples collected around offshore gas platforms. The method is based on liquid chromatography coupled to electrospray ionization mass spectrometry (LC-ESI-MS). Prior to analysis, water samples were derivatized using the Schotten-Baumann method for the benzoylation of glycols. The derivatization procedure allowed us to maximize the ESI-MS response of DEG and minimize the influence of interfering compounds. The method was validated and allowed a quantification of DEG in sea water samples with a method LOD of 0.4 ng/mL. The applicability of the procedure was demonstrated by analyzing sea water samples collected around eight gas platforms located in the Adriatic Sea (Italy).
生产水（PFW）是在海上天然气生产过程中通常排入海洋环境的最大的水性废物。化学添加剂二甘醇（DEG）广泛用于天然气生产线，因此可以在生产水中找到，成为环境关注的问题。在这项研究中，开发了一种用于痕量测定海水中 DEG 的新方法，这些海水样品是在近海天然气平台周围采集的。该方法基于液相色谱与电喷雾电离质谱（LC-ESI-MS）联用。在分析之前，水样采用 Schotten-Baumann 方法进行衍生化，用于醇的苯甲酰化。该衍生化程序使我们能够最大限度地提高 ESI-MS 对 DEG 的响应，并最大限度地减少干扰化合物的影响。该方法经过验证，允许对海水中的 DEG 进行定量，方法检出限为 0.4ng/mL。该程序的适用性通过分析位于亚得里亚海（意大利）的八个天然气平台周围采集的海水样品得到了证明。
