Nutech 8910 Ambient Air Preconcentrator for VOCs Analysis

Nutech 8910 Ambient Air Sample Preconcentrator for VOCs Analysis

The Nutech 8910 preconcentrator is the successor of Nutech’s classic model 8900DS. It has the most advanced hardware and software with unique features for the analysis of volatile organic compounds (VOCs) listed in U.S EPA Methods TO-14A and TO-15A. Functionality and longevity were the main goals in the development of Nutech’s ambient air preconcentrator.

It is suitable for the ambient air sample preconcentration in VOCs analysis which is widely adopted by environmental monitoring stations, 3rd party testing organizations, universities and research institutes and related companies.

  • Compliant with U.S EPA Method TO-14A & TO-15A and China EPA Method HJ 759-2015.

Application Notes

Nutech 8910 Preconcentrator Features

1. Strong Practicability and Wide Application Range

  • The 8910 Preconcentrator 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 sulfide analysis can fully meet the requirements of US EPA methods without any changes or accessories upgrades.
  • The 8910 Preconcentrator creates negative pressure for automatic suction and injection of samples, and has an MFC operating range 5-120mL/min with ±2% accuracy.
  • The 8910 Preconcentrator 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.

2. 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 flow path components are inert, durable, and corrosion-resistant. This eliminates unwanted carryover, chemical reactions, minimizes sample contamination, and ensures maximum recovery.

3. 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.

4. Good Compatibility, Powerful Extended Function

  • The 8910 is highly flexible, 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 (3610) for multiple sample analyses.

5. 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 flow control mode are optimized, keeping liquid nitrogen use down to a minimum.

3-Stages H2O & CO2 Management Technology

Nutech 8910 Preconcentrator 3-stage water & carbon dioxide management technologyNutech 8910 Preconcentrator Water and Cabon Dioxide 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.

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

3. Focuser Heating Injection control:

  • Heated N2 goes through the outside of the focuser column to generate rapid heating rate (Over 10000℃/min).
  • N2 is preheated in the oven.
  • Water is partially retained in focuser and can be removed as an optional step at end of GC run.

Nutech 8910 Preconcentrator Technical Data

Detection Limit0.1ppbv
Loading Range4-2000ml
Concentration Ratio>1000:1
Temperature Control±2℃ Accuracy
RSD for Most VOC Compounds with A Sample≤3%
Heating Rate10000℃/min
Maximum Power2 KW
Voltage110V/60Hz or 220V/50Hz±10%
Cryogenic Trap I Temp ( Glass Bead)-190℃~250℃
Cryogenic Trap II Temp ( Tenax Multimedia Trap)-190℃~250℃
Cryogenic Trap III Temp ( Cyofocuser)-190℃~250℃

Nutech 8910 Preconcentrator Schematic Diagram

Nutech 8910 Preconcentrator Schematic Diagram

Chromatogram

Nutech 8910 Preconcentrator TO-14 Chromatogram
Nutech 8910 Preconcentrator TO-15 Chromatogram

U.S EPA Method TO-14

U.S EPA Method TO-15