Quantification of DOSS in Marine Sediment and Sediment-Trap Solids by LC-QTOF MS, Northern Gulf of Mexico, 2010-2015

A validated method for the extraction and quantification of DOSS in solid materials undergoing sedimentation (“sediment trap solids”) and seafloor sediment collected in the Gulf is presented. The application of the LC-QTOF methodology to marine sediment and sediment-trap solids gave DOSS concentrations of 0.74-22 μg kg-1 for sediments collected between 2010 and 2015 and 1.5-6.3 μg kg-1 for sediment-trap solids collected in 2010.

本研究提出了一种经验证的分析方法，可对沉降过程中的固体物料（即"沉积物捕获器固体样品（sediment trap solids）"）以及该海湾采集的海底沉积物中的DOSS进行提取与定量分析。采用液相色谱-四极杆飞行时间质谱（LC-QTOF）方法对海洋沉积物及沉积物捕获器固体样品进行分析后，得到2010至2015年采集的海底沉积物中DOSS的浓度范围为0.74~22 微克/千克，2010年采集的沉积物捕获器固体样品中DOSS的浓度范围为1.5~6.3 微克/千克。