LC MS applications for analytical cleaning methods?

I am trying to figure out the pros and cons of implementing LC-MS as a viable analytical method for cleaning applications. I understand that it is very sensitive, but aren’t you limited to what you can recover on a swab? For example, if I can only really recover, say 0.5 mcg/cm2 from stainless steel, my regular HPLC-UV method is more than sufficient, right?