I drank 3/4 oz Vodka and had an ETG test 25 hrs. later I am 5'2 wt 125 and 60 yrs old could I test negative

Yes you could.

But there is a higher chance of testing positive. 25 hours is a short time and it takes a while to metabolism the alcohol, even if it is only 2/4oz, and eliminate the ETG/ETS.