Just sent 3 beers for lab testing. The results all show the abv less (sometimes much less) than my calcs based on pre/post gravity drop/hydrometer readings.
Beer abv lab/in house
IPA -- 4.6%/6.6%
Double IPA -- 7.4%/8.3%
Porter -- 5.3%/5.9%
I figured that the results were pretty likely to be different than I calculate, but wonder why so much, in particular, the IPA. In that case I can only assume that something was wrong with my sample, or the test/test results.
FWIW -- I have lab certified plato hydrometers, 0-8, 8-16, 16-24. I have a digital plato refractometer that I use in conjunction with the hydros to measure OG. They are almost always within .1 of each other. Finish gravity is consistent, and has remained so even using a different hydrometer.
Thanks for any feedback.
Beer abv lab/in house
IPA -- 4.6%/6.6%
Double IPA -- 7.4%/8.3%
Porter -- 5.3%/5.9%
I figured that the results were pretty likely to be different than I calculate, but wonder why so much, in particular, the IPA. In that case I can only assume that something was wrong with my sample, or the test/test results.
FWIW -- I have lab certified plato hydrometers, 0-8, 8-16, 16-24. I have a digital plato refractometer that I use in conjunction with the hydros to measure OG. They are almost always within .1 of each other. Finish gravity is consistent, and has remained so even using a different hydrometer.
Thanks for any feedback.
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