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Old 01-12-2013, 01:26 AM   #1
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Default Calculating Maple Addition?!

POsted in Brew Science but maybe it will get more traffic here...

Not sure where i should post this, i figured you guys would have the best sense of numbers here...

I brewed up an Irish stout with 004 OG 1.080
Ended up collecting around 4.8gallons into the fermentor

After the 2/3 break i added 16oz of grade b maple syrup to 300ml of boiled and cooled water. I tryed to take a refractometer sample but read over 35 Brix (highest my scale goes)

This sample was now 850ml...not sure how that worked out, possibly more than 16oz of maple in the jar? Flask markings off? anyway....

Can anyone tell me what my new OG gravity should be so i can properly measure ABV after fermentation stops?


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Old 01-12-2013, 04:23 AM   #2
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It would be nice if you used the same units (gallons and mils!!!!).

Here is how I would do it:

4.8 gallons at 1.080 = 4.8 x 80 = 384 gravity points

1 lb maple is similar to honey, so it has about 33 gravity points/lb.

Total gravity points = 384 + 33 = 417.

New volume = 4.8 + 0.22 (850 mils) = 5.02 gallons

Gravity points divided by volume = 417/5 = 83

Equivalent new OG = 1.083

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