I recently run fish tissue samples for mercury determination on MP-AES 4210 . Unfortunately my calibration curves for both Ca & Na have been failing ever since, i have tried selecting different wave lengths. the feature am using is a multi-calib i.e Ca, Mg, K and Na
I used the same standards used before and it use to be all smooth before mercury run.
could this be contamination in the sample line? if so how do i rectify it.
the intensity is getting low immediately just after the 2nd standard