Restek at Gulf Coast Conference 2024

15-16 October, Galveston, TX, U.S.

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POSTER PRESENTATIONS

TUESDAY, OCTOBER 15, 1:20 p.m., SOUTH LOBBY

ASTM D3606 Capillary Options: Products and Tips for Getting Started

Erica Pack (presenter)
Restek Corporation

Abstract
ASTM method D3606 is used to separate benzene and toluene in spark ignition fuels. Analysts may use capillary (option A) or packed (option B ) columns for this method. The capillary option uses two columns connected in series where the first column is nonpolar dimethylpolysiloxane phase (Rxi-1ms, cat# 13338) and the second is a polar ”wax” phase (Stabilwax, cat# 10657 ) column. After toluene is eluted from the first column, the first column is backflushed while an auxiliary EPC maintains flow through the second column. The complicated setup associated with the ASTM D3606 capillary option may make the method unappealing, but the results show excellent separation of target analytes. We used Restek’s Rxi-1ms and Stabilwax to separate target analytes in D3606 standard 8.5.2 and a sample of gasoline and generated helpful tips for getting started and troubleshooting this method. Future work may consider performance of this column set for a full method validation, and potential limitations.

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Separation of Neopentane in Hydrocarbon Mixture Using Helium and Hydrogen Carrier Gas–Facilitated by Pro EZGC Chromatogram Modeling

Erica Pack (presenter)
Restek Corporation

Abstract
Neopentane is an impurity in C4 hydrocarbons streams, such as 1,3-butadiene, n-butane, and butylene. It is used in a variety of applications from the production of adhesives, paints, and inks to the blowing agent in the production of polystyrene foam. While neopentane analysis is performed more frequently than in the past, chemists often have difficulty separating neopentane from other hydrocarbons due to column limitations. The unique stationary phase of Rt- Alumina BOND/MAPD columns is highly selective for C1-C5 hydrocarbons, offering excellent separation of neopentane and other impurities. The high loading capacity provides exceptionally symmetrical peaks, making these columns ideal for impurity analyses at ppm concentrations. Rt-Alumina BOND/MAPD columns are manufactured using an innovative bonding process that reduces particle generation and release, resulting in robust and reproducible retention and flow. Restek’s Pro EZGC platform has expanded to include PLOT functionality, allowing users to accurately model retention characteristics and optimize GC conditions
without timely trial-and-error.

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One-Dimensional Gas Chromatographic Analysis of European Union Fiscal Fuel Markers

Jessi Collier (presenter)
Restek Corporation

Abstract
Fuel laundering is the illegal process of removing chemical markers or dyes from government-subsidized fuel to sell as more expensive and higher-taxed fuel. In some nations, the subsidized fuel is used for agricultural purposes and residential heating as well as other specific uses. Some methods for removing the chemical markers and dyes include chemical treatment, filtration, and distillation. The illegal laundering of fuel has many negative consequences for the surrounding community, such as the government missing out on the tax revenue to maintain critical public services, the improper disposal of chemical waste contaminating the environment and exposing humans and animals to health risks, and the creation of negative economic aftereffects with market distortion. Countermeasures developed to combat this problem involve the development of a more sophisticated fuel marker which is harder to remove and easier to detect. This presentation details a one-dimensional GC-MS analytical method for identification and quantitation of a commercial fiscal marker and its preferred marker compound.

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