DB-1ht

DB-1ht Column

High Temperature GC Columns

Agilent J&W DB-1ht is a nonpolar, high-temperature 100 percent dimethylpolysiloxane GC column engineered for maximum thermal stability and long-term durability. Designed for applications that demand oven temperatures far beyond conventional limits, DB-1ht maintains exceptional inertness, stable retention behavior, and reliable peak symmetry even when operated continuously at temperatures up to 400 °C.

This column is manufactured using a specialized high-temperature polyimide-coated fused silica tubing that withstands extreme heating without deformation or degradation. Combined with its bonded, crosslinked, solvent-rinsable stationary phase, DB-1ht delivers faster elution of high-boiling compounds, reduced thermal breakdown, and cleaner baselines, making it ideal for petrochemical analysis, extended-range hydrocarbon profiling, and GC/MS workflows that involve thermally stable semivolatiles.

Whether used for high-temperature boiling-point separations, high-molecular-weight analytes, or applications requiring rigorous thermal cycling, DB-1ht provides the robustness, reproducibility, and sensitivity needed for demanding analytical environments.

Key Definitions ▸
Dimethylpolysiloxane Phase
A fully nonpolar stationary phase used for boiling-point–driven separations. In the DB-1ht formulation, this phase is stabilized for extreme temperature operation while maintaining inertness and predictable retention behavior.
High-Temperature Polyimide Coating
A reinforced polyimide outer layer applied to fused silica tubing that allows the column to maintain structural integrity during continuous exposure to temperatures up to 400 °C.
Bonded and Crosslinked Phase
A manufacturing process in which the stationary phase is chemically bonded and then crosslinked to the tubing wall. This enhances thermal stability, minimizes phase bleed, and allows solvent rinsing without damaging the column.
High-Boiling Compound Analysis
The separation of analytes with very high boiling points or high molecular weights. DB-1ht is optimized to provide faster elution and reduced thermal breakdown of these compounds under high oven temperatures.
High-Temperature GC/MS Operation
GC/MS workflows that require extended high-temperature operation for eluting late-retaining compounds. DB-1ht’s stabilized phase chemistry ensures low bleed, clean baselines, and improved MS sensitivity even near temperature limits.
Frequently Asked Questions ▸
What types of applications require a DB-1ht column?
DB-1ht is ideal for applications requiring extended high-temperature operation, including petrochemical analysis, high-boiling hydrocarbon separations, thermally stable semivolatiles, and any GC/MS workflow that requires oven temperatures up to 400 °C.
How does DB-1ht differ from standard DB-1 columns?
DB-1ht uses a specially stabilized dimethylpolysiloxane phase and reinforced polyimide-coated tubing designed for extreme thermal conditions. It offers higher temperature limits, lower bleed, and greater resistance to degradation than standard DB-1 columns.
Is DB-1ht suitable for GC/MS analysis?
Yes. DB-1ht is designed for GC/MS compatibility and provides low bleed even at elevated oven temperatures, producing clean baselines and enhanced MS sensitivity for late-eluting compounds.
Can the DB-1ht column be solvent rinsed?
Yes. DB-1ht is bonded and crosslinked, allowing solvent rinsing to remove residues and extend column lifetime without damaging the stationary phase.
What advantages does DB-1ht offer for high-boiling analytes?
The enhanced thermal stability of DB-1ht allows high-boiling compounds to elute efficiently without excessive tailing or thermal breakdown. This leads to sharper peaks, shorter run times, and improved quantitative performance.