Select Al2O3MAPD

Select Al2O3MAPD column

Application-Specific GC Columns

Agilent J&W Select Al2O3 MAPD columns are engineered with a high-purity aluminum oxide PLOT stationary phase specifically optimized for the separation and quantitation of highly reactive light hydrocarbons. Designed for methyl acetylene and propadiene (MAPD) analysis in polymer-grade feedstocks, these columns deliver the sensitivity and inertness required for accurate impurity profiling in ethylene and propylene production workflows.

The tailored Al2O3 surface chemistry minimizes adsorption and degradation—two common challenges when analyzing reactive hydrocarbons on less optimized phases. This results in up to a two-fold improvement in MAPD response, providing sharper peaks, enhanced quantitation, and greater confidence when verifying contamination levels in catalytic cracker outputs or polymer-grade olefin streams.

With thermal stability up to 200 Â°C and compatibility with hydrocarbons up to C10, Select Al2O3 MAPD columns support fast, reliable separation of C1–C10 analytes while maintaining peak integrity for even the most reactive species. Their robust PLOT construction ensures mechanical durability and consistent retention behavior in high-throughput petrochemical environments.

Ideal for impurity testing, catalyst monitoring, and process optimization in ethylene/propylene production, these columns provide the selectivity and ruggedness required for routine MAPD analysis and certification-grade hydrocarbon purity workflows.

Key Definitions â–¸
MAPD (Methyl Acetylene and Propadiene)
Two highly reactive C3 hydrocarbons commonly present as impurities in polymer-grade propylene. Accurate MAPD quantitation is essential because these species can negatively impact polymerization catalysts and downstream chemical processes.
Al2O3 PLOT Column
A GC column constructed with a porous aluminum oxide stationary phase deposited along the inner surface of the tubing. Al2O3 PLOT phases offer strong retention and selectivity for light hydrocarbons, particularly reactive olefins and dienes.
Reactive Hydrocarbons
Unsaturated or strained hydrocarbons—such as alkynes, dienes, and MAPD components—that readily adsorb, polymerize, or degrade on active surface sites. Specialized column chemistries are required to prevent signal loss and ensure accurate quantitation.
Adsorption Effects
A phenomenon where analytes interact with or adhere to active surfaces inside the GC column. This leads to peak tailing, reduced response, or non-repeatable quantitation. Select Al2O3 MAPD columns are engineered to minimize these effects.
Polymer-Grade Olefins
High-purity propylene or ethylene feedstocks used in polymer production. These streams require tight control of impurities like MAPD to protect catalysts and ensure consistent polymer quality.
Frequently Asked Questions â–¸
What are Select Al2O3 MAPD columns primarily used for?
These columns are specifically designed for analyzing methyl acetylene and propadiene (MAPD) impurities in polymer-grade propylene and ethylene feedstocks. They provide the resolution and inertness required to accurately quantify these reactive hydrocarbons.
Why is an Al2O3 PLOT stationary phase beneficial for MAPD analysis?
The aluminum oxide porous layer offers the selectivity and retention strength needed for light hydrocarbon separations while minimizing adsorption and degradation of highly reactive MAPD species. This results in sharper peaks, higher responses, and improved impurity quantitation.
How does this column improve response for reactive hydrocarbons?
Select Al2O3 MAPD columns are engineered with optimized surface chemistry to prevent adsorption and instability that typically reduce signal for MAPD components. Users typically observe up to a two-fold increase in response compared to standard alumina PLOT phases.
What is the maximum temperature rating of the column?
Select Al2O3 MAPD columns are stable up to 200 Â°C and are designed for reliable analysis of hydrocarbons up to C10, making them suitable for a wide range of petrochemical and polymerization applications.
Are these columns suitable for highly reactive samples?
Yes. These columns are specifically engineered for reactive hydrocarbons and feature enhanced inertness that reduces sample degradation, peak tailing, and inconsistent responses—common issues with conventional alumina PLOT columns.
Why buy Select Al2O3 MAPD columns from Chrom Tech?
Chrom Tech is an authorized distributor of Agilent GC columns, offering fast shipping, competitive pricing, and expert support for petrochemical MAPD workflows. Our technical team assists laboratories with column selection, method optimization, and troubleshooting to ensure reliable and reproducible impurity analysis.