Bias high Titanium results on the 7900

I am not aware of any default 'oxide' conversion in MassHunter.

Titanium requires HF to remain stable in solution. A linear high-bias across the entire calibration range could indicate that titanium was lost (low) in your calibration standards. Easy check would be compare your multi-element CAL to a single element Ti standard.  Our multi-element calibration standards have fluorine-loving analytes (Ti, Sb, Si, W, Sn, Mo, Zr) segregated in a part-B stock bottle with sufficient excess of HF. Then we mix A + B for a working solution and Ti seems sufficiently stable in the working standard for >1-2 weeks (in 5%HCL, 5%HNO3).

We have observed some instability of the titanium baseline--and hence raised Ti LOQ. I suspect this is a more subtle consequence of the same fluorine coordination chemistry.

LMK!

I am not aware of any default 'oxide' conversion in MassHunter.

Titanium requires HF to remain stable in solution. A linear high-bias across the entire calibration range could indicate that titanium was lost (low) in your calibration standards. Easy check would be compare your multi-element CAL to a single element Ti standard.  Our multi-element calibration standards have fluorine-loving analytes (Ti, Sb, Si, W, Sn, Mo, Zr) segregated in a part-B stock bottle with sufficient excess of HF. Then we mix A + B for a working solution and Ti seems sufficiently stable in the working standard for >1-2 weeks (in 5%HCL, 5%HNO3).

We have observed some instability of the titanium baseline--and hence raised Ti LOQ. I suspect this is a more subtle consequence of the same fluorine coordination chemistry.

LMK!