Analyze trace polar hydrocarbons more accurately and reliably with new alumina BOND/MAPD plot columns!

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Courtesy of Restek Corporation

  • Reproducible, predictable responses for reduced calibration frequency.
  • Exceptional capacity which improves resolution and response.
  • Highest temperature stability—application range extended to 250 °C.

New Technology Improves
Trace Analysis of Polar Hydrocarbons

The chromatographic analysis of light hydrocarbons, including unsaturated isomers, is common in the petrochemical industry. Adsorption chromatography using alumina stationary phases has proven to be very effective for the separation of these compounds. However, challenges still exist, particularly for trace analysis of polar hydrocarbons like propadiene, acetylene, and methyl acetylene. Successful analysis of these compounds is highly dependent on the deactivation of the alumina. For example, response factors for these analytes are highly variable on sodium sulfate deactivated columns (Figure 1). While some columns, known as MAPD columns (for methyl acetylene and propadiene), have been developed specifically for these compounds, existing MAPD column solutions show limitations in response factor reproducibility, capacity, and temperature stability.

Restek has solved these problems by developing a new line of MAPD alumina columns with a unique, high-performance deactivation. These columns—the Rt®-Alumina BOND/MAPD (fused silica) and MXT®-Alumina BOND/MAPD (metal) columns—offer several significant improvements over conventional MAPD columns:

  • Reproducible, predictable responses for reduced calibration frequency.
  • Exceptional capacity which improves resolution and response.
  • Highest temperature stability—application range extended to 250 °C.

These features are a significant step forward in MAPD column technology and have resulted in improvements in column performance compared to other MAPD columns. New Rt®-Alumina BOND/MAPD and MXT®-Alumina BOND/MAPD columns are not only perfect for analysis of polar hydrocarbons such as acetylene, methyl acetylene, and propadiene, but also perform well for generic light hydrocarbon analysis.

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