Dear Collegues,

When we do an instrumental calibration, we could not able to pass a validation. Our CeOxide parameter is not satisfied (we got 10 or 11% when it should be 2 or less). We work on ICPMS Shimadzu-2030. What we have done. We changed the glasses, sampling cone and skimmer, peristaltic tube, even slightly shifted inductor coil, purged by He for overnight and then for weekends, conditioning with 1%HNO3, Na 100 ppm and prepared matrix (serum). IG pressure is varied on 2.7*10-4Pa. Do you have any idea of the reason why CeOxide parameter "jumped" more then 5 times?