Analytical Instrumentation
New D3606 Column Set Outperforms TCEP Columns for Benzene Analysis
Jul 09 2009
Author: Barry Burger, on behalf of Restek Corp
Demand for finished gasolines containing ethanol continues to increase, as these fuels reduce greenhouse gas emissions and can be used to help control air pollution. Ethanol is a cost-effective additive for production; however, its presence significantly complicates the analysis of benzene, a regulated carcinogen which is added to increase octane levels. Accurate benzene and toluene analysis is critical because incorrect data can result in inaccurate octane levels and out-of-specification product. Toluene analysis is straightforward, but benzene is extremely difficult to separate from ethanol on the 1,2,3-tris(2-cyanoethoxy) propane (TCEP) column listed in ASTM method D3606. A new D3606 column set developed by Restek separates benzene and ethanol completely and more reliably than TCEP columns, resulting in tighter control and more accurate results for refineries and contract laboratories.
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