Can I get tritium run at another lab and just use the contract to determine the helium, neon and d3He?
Yes. But this is not recommended. But to do so, just return copper tubes (schedule 1033) without requesting tritium by ingrowth (labcode 2112), via your sample submission form. Make a special point of indicating that only schedule 1033 is requested. The contract lab will report analytical results for helium, neon, and d3He. They will not interpret a 3H/3He age, even if you provide the tritium analysis. You will be responsible for calculating the 3H/3He age from the analytical data.