Time limit to sned in collected oil?

Northern California
I really would like to perform a UOA for my Neon on the upcoming oil change (most likely within the next 2 says), but being unemployed right now, I can't justify spending money on a UOA. If I collect the oil in the correct manner, will it still be fine to send in later? I don't see why it wouldn't be, but just want to be sure. Thanks. ;\)