Detection and Identification of Dispersants (COREXIT® 9527 and 9500) by GC/MS and LC-MS/MS
Poster May 25, 2011
Sky Countryman, Matthew Trass, Seyed Sadjadi, Jeff Layne
Revised estimates published by the National Incident Command’s Flow Rate Technical Group (FRTG) report that 4.9 million barrels of oil were released into the Gulf of Mexico. The oil posed a significant health risk in the plant and animal life within the Gulf region. To help reduce the amount of oil that reached the coastline, dispersants were used to break-up the oil and sink it to the bottom of the ocean. Dispersants are composed of a mixture of solvents and detergents that break-up the heavy oil into droplets and allow it to be more readily decomposed in the environment.
Although limited quantities of COREX IT 9527 were used, the primary dispersant used in the cleanup effort was COREX IT 9500. Though the proprietary components of COREX IT were kept secret, Nalco has now disclosed the exact composition on their website. Debate still exists over the potential environmental risk that the dispersants pose. To better understand the level of dispersants in the Gulf and their movement, we propose several analytical procedures to measure the unique components found in both products.
Using Elemental Analysis For Discrimination Of Pinot Noir Wines From Six Different Districts In An AvaPoster
The determination of geographical origin of wine is gaining increased interest by researchers and federal agencies around the world, partially due to increased fraud with regards to place of origin labelling. For wine, multi-elemental profiling of macro, micro, and trace elements has been proposed for determination of authenticity. Commercial wines from different wineries in 5 different neighborhoods within one AVA show characteristic elemental fingerprints. Macro, micro and trace elements as well as elemental ratios contribute to the observed separation, indicating the involvement of multiple factors and underlying mechanisms, including location and soil composition, elemental uptake by vine and rootstock, viticulture and nutrient management, water sources, and small differences in the different wineries.READ MORE
Fast arsenic speciation analysis of wines and rice with LC-ICP-QQQPoster
This method was designed in response to recent and proposed food standards, both international and national, that limit inorganic arsenic rather than total, organic, or individual arsenic species such as arsenite (AsIII) and arsenate (AsV). Analysis time is 10x faster than the current FDA regulatory method, increasing sample throughput, avoided spectral interferences and dramatically increased sensitivity. Validation data from two laboratories demonstrate the method’s accuracy and reproducibility of both wine and rice matrices in a single analytical batch.READ MORE
Elemental profiles of whiskies allow differentiation by type and region by inductively coupled plasma –optical emission spectroscopy (ICP-OES)Poster
The analysis of the elemental composition of whiskies provides a host of important information including sample origin and understanding how different whiskey styles are caused by processing equipment and raw materials. Preliminary data analysis of the whiskies showed that element compositions could possibly be used to differentiate samples based on age, type, and region.READ MORE