Abstract:

Thin films of Macondo source oil (provided by BP), surrogate oil (provided by BP), and residual fuel oil (NIST SRM 2171a) were individually exposed to simulated sunlight. After exposure, the aqueous phase was derivatized with 2,4-dinitrophenylhydrazine (DNPH), which selectively reacts with aldehydes and ketones. After a clean up step, derivatized samples were analyzed by electrospray-MS-MS (negative ion mode) and characteristic fragmentation patterns were used to identify derivatized aldehyde and ketones. Comparison to dark controls and irradiated seawater (no oil) allowed identification of products that were unique to the irradiated samples.

Suggested Citation:

Xian Cao, Matthew A. Tarr. 2017. Carbonyl photoproducts from solar irradiated oil films on seawater. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7D21W0Z

Publications:

Cao, X., & Tarr, M. A. (2017). Aldehyde and Ketone Photoproducts from Solar-Irradiated Crude Oil–Seawater Systems Determined by Electrospray Ionization–Tandem Mass Spectrometry. Environmental Science & Technology. doi:10.1021/acs.est.7b01991

Purpose:

To identify the aldehyde and ketone photoproducts in in the aqueous phase of crude oil-seawater systems.

Data Parameters and Units:

Molecular weight and relative abundance of water soluble aldehyde, ketone, and carboxylic acid photoproducts.

Methods:

2,4-dinitrophenylhydrazine (DNPH) derivatization, ESI-MS/MS

Instruments:

Triple quadrupole micromass API mass spectrometer

Individual Files: