YANG, CHUN
[Author];
Fieldhouse, Ben
[Author];
Alexander Waldie, Alexander
[Author];
Yang, Zeyu
[Author];
Hollebone, Bruce
[Author];
Lambert, Patrick
[Author];
Beaulac, Vanessa
[Author]
Simultaneous Quantitation of Salt Dioctyl Sodium Sulfosuccinate (Doss) and Fingerprinting Analysis of Dispersed Oil in Aqueous Samples
Description:
In many jurisdictions, dispersants are included in contingency plans as a viable countermeasure that can help reduce the overall environmental impact of marine oil spills. When used, it is imperative to monitor the progression of dispersant and oil to assess their environmental fate and behaviour. Amphiphilic salt dioctyl sodium sulfosuccinate (DOSS) is the major effective component of the most commonly available dispersants, such as Corexit® EC9500A. In this work, solid phase extraction (SPE) weak anion exchange cartridges were used to separate oil and DOSS in aqueous samples. DOSS was accurately determined by liquid chromatography coupled with a high resolution Orbitrap mass spectrometer (LC-HRMS). Oil fingerprinting analysis was conducted and total petroleum hydrocarbons, polycyclic aromatic hydrocarbons, and petroleum biomarkers were determined by gas chromatography-flame ionization detection and mass spectrometry (GC-MS). This SPE-LC/GC-MS method was used for the analysis of oil-dispersant water samples containing a mixture of dispersant and various crude oils and refined petroleum products. Simultaneous quantitation of oils with dispersants was achieved using this method. TPH loss was possibly attributed to oil retained by the SPE column. Chemical fingerprints and diagnostic ratios of target compounds in recovered dispersed oil overall remain unchanged compared with those of all studied oils