ZHONGKEHUIFEN Packed Column Series for Gas Chromatography

Overview

The ZHONGKEHUIFEN Packed Column Series is a family of robust, precision-engineered capillary- and packed-format chromatographic columns designed for use in gas chromatography (GC) systems. These columns operate on the principle of partition-based separation, where analytes are differentially distributed between a stationary phase (chemically bonded or coated onto the inner wall or packing material) and a mobile phase (carrier gas such as helium, hydrogen, or nitrogen). Unlike open-tubular capillary columns, packed columns utilize solid support particles—typically diatomaceous earth or polymer-based carriers—impregnated with liquid stationary phases (e.g., polydimethylsiloxane, cyanopropylphenyl polysiloxane, or carbowax). This architecture delivers high sample loading capacity, excellent thermal stability up to 250 °C (depending on phase chemistry), and reliable performance for routine qualitative and quantitative analysis of volatile and semi-volatile organic compounds.

Key Features

• Wide selection of stationary phase chemistries—including non-polar (SE-30, OV-1), polar (Carbowax 20M), and intermediate polarity (OV-17, OV-210)—enabling method development across diverse compound classes.
• Consistent packing density and uniform particle size distribution (typically 60–80 mesh or 80–100 mesh) ensure reproducible retention times and peak symmetry.
• Stainless steel and glass column tubing options available; all columns undergo rigorous leak testing and conditioning prior to shipment.
• Customizable dimensions: standard lengths range from 1 m to 6 m, internal diameters from 2 mm to 4 mm (ID), with tailored phase film thicknesses and support loadings upon request.
• Compatible with all major GC platforms—including Agilent, Thermo Fisher, Shimadzu, and PerkinElmer—via standard 1/4″ or 1/8″ compression fittings.

Sample Compatibility & Compliance

The ZHONGKEHUIFEN Packed Column Series supports analysis of gases, light hydrocarbons, alcohols, ketones, esters, organic acids, and halogenated compounds. Columns are validated for use in environmental monitoring (EPA Method 8021B, 8240), petrochemical quality control (ASTM D3606, D5503), and pharmaceutical residual solvent testing (USP ). All columns comply with ISO/IEC 17025 requirements for reference material traceability, and manufacturing documentation—including batch-specific test chromatograms and retention index verification—can be supplied upon request. Columns meet GLP-compliant laboratory standards when used in conjunction with audit-trail-enabled GC data systems.

Software & Data Management

While packed columns themselves are hardware components, their integration into modern GC workflows relies on chromatography data systems (CDS) such as OpenLab CDS, Chromeleon, or Empower. ZHONGKEHUIFEN provides comprehensive column identification sheets containing phase type, temperature limits, recommended carrier gas flow rates, and typical retention indices (e.g., Kovats or McReynolds values). These documents support method transfer, system suitability assessment, and regulatory reporting. For laboratories operating under FDA 21 CFR Part 11, column lot numbers and calibration history can be linked to electronic records via LIMS or CDS metadata fields to satisfy audit trail requirements.

Applications

• Environmental analysis: detection and quantification of BTEX (benzene, toluene, ethylbenzene, xylene) in soil and water extracts.
• Petrochemical QA/QC: determination of hydrocarbon distribution in gasoline, diesel, and jet fuel per ASTM D1319 (fluorescent indicator adsorption) and D5769 (GC method).
• Food & flavor chemistry: profiling of volatile aroma compounds in beverages, dairy products, and fermented foods.
• Industrial hygiene: workplace air monitoring for solvents including acetone, methanol, and chloroform using NIOSH or OSHA sampling protocols.
• Academic research: method development for chiral separations using derivatized amino acid or cyclodextrin-based packed phases.

FAQ

What carrier gases are compatible with ZHONGKEHUIFEN packed columns?
Helium, hydrogen, and nitrogen are all suitable; hydrogen offers optimal efficiency and speed, while nitrogen provides maximum resolution for complex mixtures.
Can these columns be used on modern capillary-only GC instruments?
Yes—with appropriate inlet adapters (e.g., packed-column injection port or universal liner) and pressure/flow recalibration; consult instrument manual for mechanical compatibility.
How should I condition a new packed column before first use?
Condition at 20–30 °C below maximum phase temperature for 2–4 hours under carrier gas flow; monitor baseline stability and absence of ghost peaks.
Do you provide column certification reports?
Yes—batch-specific test reports include retention time reproducibility (RSD <1.5% for n-alkanes), bleed profile, and resolution testing against standard mixtures.
Is technical support available for method development?
ZHONGKEHUIFEN offers application consultation, including phase selection guidance, temperature programming strategies, and troubleshooting for tailing, fronting, or column overload effects.