Riddle Day 5 - Which area of analytical science and research is Santa Claus most versed in?

[Molly_I2]

Clearly Santa Claus knows a lot of things, but he is an expert in one thing above all else. There may be a hint in an earlier riddle, see if you can guess!

Yesterday's riddle (Day 4) - Spoiler available below!

👨‍🔬❄️🎅What is Santa Claus’s favorite chemical element?

Spoiler

Scandium, because they have the same initials (Sc)

[paulette_parker]

ICP-MS because Santa needs to do frozen water analysis to ensure North Pole Snow is always clean.  

[DanielEttlin]

Sugar and Carbohidrate Ion Chromatography Analysis on a ICS6000