After taste

After taste – the taste left in the mouth by some wines after they have been tasted
After taste is measured in time: short, average or long.
An average after taste lasts 5-10 seconds.

Swallowing or spitting out produces the same result,
Because there are no gustatory papillae or smell receptors in the throat.

You can, however better determine the percentage of alcohol:
The more you experience a burning feeling in your throat, the more alcohol.