Can running in Helium mode help pick up Pb in single digit ppb on our 7500ce ICP-MS?

Hello dlindsey,

Sometimes, residual contaminations of Pb can give lower precision for traces.

Can you please check your Background Equivalent Concentration (BEC)?

If your BEC is higher than 1-5 ppb, then it can be the cause.

To get good data, you will then have to chase the source of Pb contamination until you get a BEC lower than 1ppb.

Main sources may be :

Acids,

containers,

etc...

Hello dlindsey,

Sometimes, residual contaminations of Pb can give lower precision for traces.

Can you please check your Background Equivalent Concentration (BEC)?

If your BEC is higher than 1-5 ppb, then it can be the cause.

To get good data, you will then have to chase the source of Pb contamination until you get a BEC lower than 1ppb.

Main sources may be :

Acids,

containers,

etc...