... gas. 4, when after drinking, recommendations for 20 minutes before the test, because alcohol in human ... of digestion and absorption of the time about 20 minutes, but left in the mouth alcohol also ... 2 minutes, don't repeat measurement.In test 20 minutes do not smoke, eat. 5, please ... drinking wine, immediately alcohol test, display values may be relatively high, but 20~30 minutes after the test, the ...