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Ag Calibration Curve on ICP-MS 7900

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Hello everyone, 

I am having trouble to get a good calibration curve just for Ag. 

my standards are 0, 25 ppb, 50 ppb, 75 ppb, 100 ppb and 400ppb. And the matrix is 2% HNO3. 

All the other elements are good I get R=0.9999 but for Ag it is terrible. I have R=0.1123 like this. And I am not sure what to do! 

Thank you for your help 

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    I was having the same problems a couple of months ago.  I run drinking water so we do not ever see Ag in our samples so I lowered our calibration standards to 0.5ppb, 1ppb, 2.5ppb, 5ppb and 10ppb.  I was trying to put as little Ag as I could to prevent sticking.   I changed all of my lines and when I changed the lines going into my T mixer (we have our ISTD inline) I have not had any problems.  I also put a unicorn on top of it LOL!

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  • 0

    I was having the same problems a couple of months ago.  I run drinking water so we do not ever see Ag in our samples so I lowered our calibration standards to 0.5ppb, 1ppb, 2.5ppb, 5ppb and 10ppb.  I was trying to put as little Ag as I could to prevent sticking.   I changed all of my lines and when I changed the lines going into my T mixer (we have our ISTD inline) I have not had any problems.  I also put a unicorn on top of it LOL!

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