Similar to HS-20 LongTX Model, which interfaces with the GC-2014 gas chromatograph through a longer (60-inch) transfer line, the HS-20 Loop Model is designed for:

  1. Traditional static HS applications
  2. Methods using the pressure-loop sampling technique
  3. Applications requiring greater sensitivity via the HS-trap technique

Ideal for environmental samples, materials characterization, pharmaceutical residual solvents, blood alcohol determination, among other applications.

Key Features

  • Immediate Access to Samples

    • The open access, 90-position sample tray provides immediate access to all samples at all times

    Headspace Vials

    • Uses standard, round-bottom 10-mL and 20-mL headspace vials without adapters

    Equilibration Temperature

    • Maximum equilibration temperature of 300 °C permits analysis of high-boiling compounds

    Easy Routine Maintenance

    • The headspace needle, passivated loop, and trap (HS-20 Trap model only) are easily accessible from the top of the instrument for routine maintenance

    GC or GCMS Analysis

    • Can be used for GC or GCMS analysis – the GC version is compliant with FDA CFR 21 Part 11
  • Bar-code Reader

    • An optional bar-code reader logs sample ID for traceability

    Improve Repeatability

    • The 12-position equilibration oven loads from the bottom to minimize heat loss and improve repeatability

    Multiple Operational Modes

    • Static headspace mode, headspace-trap mode (HS-20 Trap model only), multiple headspace extraction (MHE) mode, and method development mode


    • A sample is sealed inside a HS (headspace) vial, allowing the VOCs in the sample to equilibrate between the gas and liquid phases by adjusting the temperature, time and through agitation. After the vial is pressurized, a portion of the headspace is sampled for analysis. Volatiles from the HS are sampled up to 10 times, and concentrated on a Peltier-cooled adsorbent trap prior to desorbing to the GC or GC/MS for analysis.

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