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Old 07-09-2014, 07:56 AM   #1
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Default alpha acid discrepancy - herkules 6.6 vs 17%

I bought some herkules from themaltmiller, 2011 harvest vac packed cones. They've labeled it as 6.6% alpha acid but checking online it's generally coming up as 17% and 'be careful how you use it'. I don't know at what point the alpha acids would be measured and whether a few years storage could cause a 10% drop but I'm wondering who to believe - I'm itching to give them a try but don't want to end up wasting them on something undrinkably bitter or way too watery.

Any suggestions on what to do with them?

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Old 07-09-2014, 05:27 PM   #2
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I would suggest finding some super light commercial beer and doing a test with them similar to this:

http://www.bertusbrewery.com/2013/03...light.html?m=1

Maybe do a comparison with some other hop you have laying around. It won't necessarily tell you what the AA are currently but it may give you a general sense of potency and flavor contribution.

Also, have you already inquired directly with the vendor to see how they arrived at the info on their label? Maybe that sticker was intended for a batch of Saphir hops.

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Old 07-11-2014, 06:34 AM   #3
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No reply from the vendor yet so I'll have to go by taste. I might see if I've the wherewithal in the lab to do a direct measurement, it'd be a learning experience if nothing else

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Old 07-11-2014, 12:14 PM   #4
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They've just got back to me - apparently it is correct it's just that the variety has been wildly variable over the last few years.

Given that it's the offspring of Hallertau taurus and should be quite peppery I'm wondering if I dare use it in a saison this weekend.

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