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Moisture in our detector fuel line?

jason.minter

 We are trying to validate a new method, and our area counts are low and inconsistent. Our Hydrogen is from a generator and goes through an indicating filter. I replaced said filter recently, and am seeing it respond to moisture fairly quickly. How often should I really need to replace this filter in order to protect my gas supply? Bear in mind that this same hydrogen is also being used as carrier on some instruments, so I'm trying to protect columns as well. Is it possible that enough moisture is still in the line, even after filtration, to affect the FID response?

 

Thanks again

Jason in TX

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    Hi Jason,

     

    which filter do you use? Just give me the part number and I can check the capacity for moisture. Also the type of hydrogen (99.9999%, 99.999% or 99.996%) helps in the calculation.

     

    On the other hand, even with those gas qualities mentioned above and thinking about the fuel line only, it won't affect the function of the FID.

     

    If your area counts vary that much it is normally a sign that you loose analytes in the injection system, maybe by leakage or septum purge.

     

    Best regards,

     

    Norbert

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  • 0

    Hi Jason,

     

    which filter do you use? Just give me the part number and I can check the capacity for moisture. Also the type of hydrogen (99.9999%, 99.999% or 99.996%) helps in the calculation.

     

    On the other hand, even with those gas qualities mentioned above and thinking about the fuel line only, it won't affect the function of the FID.

     

    If your area counts vary that much it is normally a sign that you loose analytes in the injection system, maybe by leakage or septum purge.

     

    Best regards,

     

    Norbert

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