I have a method for analysis of a herbicide in GC-ECD. can I use the same method of analysis in GC-FID or GC-FID TCD?
Dear Dr. Parsanta.
ECD detector is the most sensitive, compared to other detctors types for detection of organic molucles containing halogen ( Cl, Br, nitro.... ).
Goodluck.
Ahmed.
Ahmed Halfadji thanks for your answer. but many studies have been carried out with the help of FID detector. Also, our Lab has only FID and TCD detectors. That's why I have to look for the methods which are related to FID detector.
@Prasanta Magee, may be this can help you :
Development and optimization of a method for the determination of simazine, atrazine and propazine using solid-phase extraction and HPLC/GC.
http://www.doiserbia.nb.rs/Article.aspx?ID=0352-51390103199T#.YPqbjFPftkx
Goodluck.
hi
If your herbicide is a halogenated compound and can be detected with an ECD detector, it can be analyzed using the same method.
You can definitely start by trying the same method with FID, but eventually, you will need to end up with some modifications to get the optimum conditions in your new instrument (GC-FID)
If the method you found is for herbicide with halogens (Cl probably) and you want to measure low concentrations and you have a dirty matrix, it will not work. The FID is most probable not sensitive and specific enough. And forget about the TCD.
"but many studies have been carried out with the help of FID detector."
10, 20 or 30 years back maybe, and what sort of studies? Current studies of halogenated herbicides, I doubt they use a FID or even an ECD, or the concentrations must be high. Current studies will be with GCMS or GCMSMS.
I suggest to upgrade your equipment.
You need to optimize and validate of your newly developed method hen using a different detector
Hello,
In most cases when you are using ECD you can analyze halogen compounds and it is sensitive its require a smaller quantity of sample and use splitless injector type oven ramping at 60-degree celsius. Coming to the FID, it is a destructive type detector that uses the detection of ions formed during the combustion of organic compounds in a hydrogen flame. These ions are proportionate to the concentration of organic analyte in the gas stream. In TCD works on organic and inorganic, have a different thermal conductivity from helium. The TCD is also used in the analysis of permanent and inorganic gases (For eg, argon, oxygen, nitrogen, carbon dioxide, carbon monoxide, sulfur dioxide) because it responds to all these substances unlike the FID, which cannot detect compounds which do not contain carbon-hydrogen bonds. Before starting analysis, check detector type, sample type, and usage of method.
Good luck.,
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