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Author Topic: Adjusting IBU's  (Read 3354 times)

Offline tommymorris

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Re: Adjusting IBU's
« Reply #15 on: May 20, 2016, 08:49:45 am »
Using this calculator
http://realbeer.com/hops/bcalc_js.html

I made a hop addition to match your numbers: 1.9 oz 10% AA added at 60 min.

For the original recipe (1063 OG 5.5G) the calculator predicts 50 IBU (you stated 49.9).

I then changed the OG to 1052 and batch size to 5G with the same hop addition. The new predicted bitterness is 61 IBU.

So, according to this Tinseth calculator your  bitterness will have increase by 20%. 20% sounds like a lot but I think your beer should be fine. 

Two things you can do if the beer is too bitter:

1. Water it down. Not recommended
2. Blend with another beer. Blending can yield great results.

Offline erockrph

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Eric B.

Finally got around to starting a homebrewing blog: The Hop Whisperer

Offline blair.streit

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Re: Adjusting IBU's
« Reply #17 on: May 20, 2016, 09:43:59 am »
http://www.bayspec.com/spectroscopy/portable-mass-spectrometer/

just putting this out there as an option  ::)
I think is more along the lines of what you're looking for:

http://www.coleparmer.com/Product/Cole_Parmer_Scanning_Single_Beam_UV_Visible_Spectrophotometer_115_VAC/UX-83057-30
$5,310 for the spectrophotometer is fine, but they want almost $100 for shipping. That's where I draw the line.

Offline dmtaylor

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Re: Adjusting IBU's
« Reply #18 on: May 20, 2016, 10:23:39 am »
Dave

The world will become a much more pleasant place to live when each and every one of us realizes that we are all idiots.

Offline Stevie

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Re: Adjusting IBU's
« Reply #19 on: May 20, 2016, 05:44:26 pm »
Prime and MoreBeer ruined me too. I'll spend an extra $20 with MoreBeer before I'll give them $6 for shipping.