热解吸器

  • Volatile & Semi-volatile compounds in Solid Matrices
  • Mounts in the Valve Oven on the 8610C GC
  • High Temperature & High Sensitivity
  • Manually Actuated 10-port Valve
  • No solvent extraction required
  • Simple to Use
热解吸器
The SRI 热解吸器 permits volatile and semi-volatile compounds in soil, or other solid matrices, to be injected and analyzed with little or no sample preparation, and with very high sensitivity. With the 热解吸器, no solvent extraction is required. This is a major convenience for field operations, and helps save on costs. Little operator skill is needed, and 4-10 analyses can be run per hour, depending on specific requirements.

Because of the large sample size € up to one gram, an analyte present in the soil at 1ppm desorbs 1000 nanograms onto the GC column. This results in detection limits in the ppb range for most compounds. Sandy soil can typically be desorbed with no sample preparation at all. Clay soil is first mixed with sodium sulfate granules to break the clay into a fine powder coating the granules, then the clay and sodium sulfate mix is desorbed.
This chromatogram is from a GC with a 热解吸器 and an 火焰离子化€测器. Synthetic diesel range samples like this are used to verify complete desorption. Sample: 2000ng synthetic diesel range organics desorbed from soil.
Sample: 2000ng synthetic diesel range organics desorbed from soil
These two chromatograms show the analysis of PCB 1254 standard in diesel oil with our PCB GC system, which is equipped with a 热解吸器 and an FID DELCD联合€测器. The FID shows the diesel hydrocarbons and the PCBs, but the PCB peaks are obscured by the diesel peaks. In contrast, the DELCD shows the PCBs only, revealing what was essentially hidden in the FID chromatogram.
Analysis of PCB 1254 standard in diesel oil with our PCB GC system
This set of chromatograms show the analysis of a real world standard: 0.3 grams of soil from a contaminated site. This real world standard is certified by NIST to contain 1.34ppm PCBs. The FID shows a large hydrocarbon matrix which is pre-combusted in the FID flame prior to reaching the DELCD, which shows a clean PCB 1254 chromatgram. Pre-combustion of the sample by the FID protects the DELCD from hydrocarbon contamination.
Analysis of a real world standard: 0.3 grams of soil from a contaminated site
Product number:
8690-1088 热解吸器 on 8610C GC
Includes 10 reusable glass desorber tubes
8690-1087
10-pack reusable ground glass desorber tubes