GC-FID / ECD / TCD
HP 5890 GC with two FIDs and HP Automatic Liquid Sampler. The EzChrom Elite Chromatography Data System for GC Control, data acquisition and processing.
Current setup for the analysis of alcohols in water samples. The HP Nitrogen Phosphorous and Electron Capture Detectors are also available by request.
Varian 3400 GC with dual ECDs and CTC A 200S Autosampler. The EzChrom Elite Chromatography Data System for data acquisition and processing.
Current setup for EPA methods 551 (for analysis of chlorinated solvents in water), 552 (for analysis of haloacetic acids in water).
HP 6890 GC with two FIDs, GC PAL autosampler. EzChrom Elite Chromatography Data System
The GC can be easily reconfigured with any capillary column and used for any application.
GC DETECTORS
The GC detector is the brain of any GC instrument. All detectors work by sensing some physical or chemical property of the components passing through the detector cell. The choice of detector type depends on particular analytical purpose and compound of interest (see Table for details).
|
FID |
ECD |
TCD |
Type |
Universal |
Selective |
Universal |
Destructive |
Yes |
No |
No |
Responds to: |
Compounds that ionize |
Electronegative Substituents |
Compounds having different thermal |
Linear |
107 |
104 |
106 |
|
0.5 ng/μl to 500μg/μl |
0.5 pg/μl to 1ng/μl |
ng/μl - 100% |
Minimum Detectible Level Typical Applications |
5 pg C/sec Organic solvents &chemicals, |
0.1 pg Cl/sec Chlorinated pesticides, |
400 pg/ml carrier Gas purity, |
|
PID |
ELCD |
NPD |
Type |
Selective |
Selective |
Selective |
Destructive |
No |
Yes |
Yes |
Responds to: |
Compounds ionized by UV |
Compounds containing |
N, P, heteroatoms |
Linear |
107 |
106 for chlorine |
104 |
|
pg/μl to 0.1% |
pg/μl to ng/μl |
pg/μl to μg/μl |
Minimum Detectible Level Typical Applications |
2 pg C/sec Environmental analysis |
0.5 pg/Cl/sec; 2 pg/S/sec VOCs, PCBs in oil, |
0.4 pg N/sec; 0.2 pg P/sec Drugs of abuse, Nitrogen/Phosphorous |
|
AED |
MSD |
|
Type |
Universal |
Universal |
|
Destructive |
Yes |
Yes |
|
Responds to: |
All elements except He |
All compounds |
|
Linear |
103-104 |
106 |
|
|
- |
10 pg/μl to 2000 ng/μl |
|
Minimum Detectible Level Typical Applications |
0.1pg – 1ng (depending on element) Petroleum Applications, |
10 pg (SIM) Drug analysis, Environmental analysis, |
|