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Blank Run

revathy

Hi

I have noticed something different this morning. I did a black run without injection( after I changed the inlet and septum) using my method(same method) continuously for three times. All the three times I am getting different chromatogram, as seen below. Can anyone help me and explain why they are different and is there anything wrong which I need to correct. I am using GC 7820 A with FID Detector.

Run 1

Run 2

Run 3

 

 

 

Thanks in Advance

Revathy

Parents
  • 0

    hi

    please check blank run without syringe injection

    remove the syringe from  ALS and inject one black run

    if got same than you inject 4-5 solvent injection and conditioning the inlet detector and column

    if you have new jet please remove old and use new jet

    after this activity  issue same .please fill room air in ALS syringe and inject

    same issue that's mean there is some contamination in room air

Reply
  • 0

    hi

    please check blank run without syringe injection

    remove the syringe from  ALS and inject one black run

    if got same than you inject 4-5 solvent injection and conditioning the inlet detector and column

    if you have new jet please remove old and use new jet

    after this activity  issue same .please fill room air in ALS syringe and inject

    same issue that's mean there is some contamination in room air

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