Delivering the Right Results for VOCs

8910 Preconcentrator

The 8910 has the most advanced hardware and software with unique features for the analysis of compounds listed in EPA Methods TO-14 and TO-15. Functionality and longevity were the main goals in the development of Nutech®’s preconcentrator.

    Technical Data

    Detection limit


    Loading range


    Concentration ratio


    Temperature control

    ±2 accuracy

    RSD for most VOC compounds with a sample


    Heating rate


    Maximum power

    2   kW


    110V/60Hz   or 220V/50Hz±10%

    Three stage cryogenic traps

    Glass bead:  -190to 250

    Tenax multimedia trap:  -190 to 250

    Cryofocuser: -190 to 250



    Strong Practicability and Wide Application Range

    The 8910 uses the classical 3-stage module (two cryogenic traps and one cryofocuser). Coupled with a new generation of advanced H2O & CO2 management technology, its preset methods for TO-15, PAMS and sulde analysis can fully meet the requirements of US EPA methods without any changes or accessories upgrades. 

    The 8910 creates negative pressure for automatic suction and injection of samples, and has an MFC operating range 5-120mL/min with ±2% accuracy. 

    The 8910 has a standard total volume injection range (4-2000 mL).  With a quantitative ring injection valve, the minimum injection volume can be as low as 0.2mL, allowing a total volume range to be 4 orders of magnitude.


    High Sensitivity

    The concentration rate is increased more than 1000X, vastly lowering the detection limit of GC or GC-MS. 

    The advanced temperature control keeps the variation under ±2
    , assuring stable and accurate analysis. 

    The pipeline, valve and other
    ow path components are inert, durable, and corrosion-resistant.   This eliminates unwanted carryover, chemical reactions, minimizes sample contamination, and ensures maximum recovery.


    High Automatic, Powerful Software

    The software is powerful and easy to operate. The system has the ability to perform automatic leak checking, generate reports, and create alarm errors automatically. The software continuously displays operation status, records processed data, and supports QA/QC report printing. 


    Good Compatibility, Powerful Extended Function

    The 8910 is highly exible, allowing users to establish a new analytical method according to their application needs. It is compatible with different types of GCs or GC/MSs in the market.  It can be used directly with an instrument, or be coupled with an automatic sampler for multiple sample analyses. 

    Long-term Stable Operation

    Internal structure is optimized in a modular design.   Isolation of temperature control module, sensitive components, and the external liquid nitrogen valve effectively avoiding large temperature changes, condensation interference, rust on electronic components. The net result is the long-term stable operation of the instrument. 

    The small volume trap is designed so that its temperature and liquid nitrogen
    ow control mode are optimized, keeping liquid nitrogen use down to a minimum.

    3-Stages H2O & CO2 management technology:

    1. Control Trap 1 temperature and transfer parameters allow for the partial retention of water within Trap 1 during Trap 1 to Trap 2 transfer.

    2Control Trap 2 material property and temperature to avoid water and CO2 being trapped.

    3. Focuser Heating Injection control:

    a. N2 is preheated in the oven.

    b. Heated N2 goes through the outside of the focuser column to generate rapid heating rate (Over 10000℃/min).

    c.Water is partially retained in focuser and can be removed as an optional step at end of GC run.


    TO-15 Analysis

    TO-14 Analysis