HOPS calculating correct AA

[MaxStout]

So, short of us sending in samples to a lab every brew, the best we can do is guess. Too many variables between hop production to brew. Which brings us back to what @Vale71 pointed out in the second post.

Make the best guess, and if the hops aren't right, adjust the recipe next time. It's what I do anyway, so it's all good.

 

[Imhoppy]

Even with precise, accurate, and repeatable lab results, the other factor to consider is the "perceived" bitterness. Depending on the recipe, one suposses a sample of the same brew could be interpreted in several different ways by various tasters. With that in mind, does it make sense to have a lab analysis performed? Just save that expense and use the savings to brew another batch or two. [emoji481]

 

[Allan Siegle]

Looks like the original calculator was announced here (back in 2012):
https://www.homebrewtalk.com/forum/threads/old-hops-aa-calculation.330373

"Brewing Techniques Magazine was published from 1993 to 1999 (link) ... In 2012, MoreBeer purchased the entire back stock of printed magazines. Those are available in the Homebrewing Books & Magazines section of MoreBeer’s website.".

A web search on the author / title lead to https://www.coursehero.com/file/16936036/Hop-Storage/, which suggests that the article that may have been used for the calculations was published in the Jan/Feb 1994 issue of the magazine.

A careful read the of the JavaScript code and the article would confirm both the source and the accuracy of the implementation of the equations. Note that this doesn't address the accuracy of the equations in the article.

For something that's known to be newer, https://www.masterbrewerspodcast.com/123 is worth a listen.

Thank you I gave a listen this morning on my way to work. It was very insightful!! It gives me hope that my 1 batch I brewed using that calculator isn’t overly hoped. I loves a good hoped beer but the crazy insane types. I’m huge fan of stouts as well. I’m still learning and have to keep brewing untill I get my process down.

 

[Hackrsackr]

Man just out here tryna [emoji366][emoji981].

 

[BrewnWKopperKat]

Thank you I gave a listen this morning on my way to work

Brülosophy podcast Episode 046 | Maintaining Hop Freshness is also worth a listen.

 

[Miraculix]

I also found that after years in the freezer, the hops alpha seemed to not have decreased in a significant level. The flavour and aroma however has suffered a lot during that time.

 

[ScrewyBrewer]

An article published by Mark Garetz offers a look into something called Hop Storage Index, or HSI for short. A deep dive on the subject by Scott Janish details findings on the subject as well. I admit if you're someone looking for a quick yes or no answer you won't find it in either of their articles. But if more hop suppliers than ever now print HSI numbers on their hop packages it must be for a reason.

 

[MaxStout]

An article published by Mark Garetz offers a look into something called Hop Storage Index, or HSI for short. A deep dive on the subject by Scott Janish details findings on the subject as well. I admit if you're someone looking for a quick yes or no answer you won't find it in either of their articles. But if more hop suppliers than ever now print HSI numbers on their hop packages it must be for a reason.

I'd be happy if hops suppliers would at least print the harvest year on their packaging.

 

[Silver_Is_Money]

An article published by Mark Garetz offers a look into something called Hop Storage Index, or HSI for short. A deep dive on the subject by Scott Janish details findings on the subject as well. I admit if you're someone looking for a quick yes or no answer you won't find it in either of their articles. But if more hop suppliers than ever now print HSI numbers on their hop packages it must be for a reason.

This seems like a far more logical approach to AA decay than the OP's calculator link.

 

[Denny]

But the analyses done by breweries tracking every batch, dozens a day, for decades, in their own labs, do establish it. More data points needed?

You're correct. The only way to get any kind of accurtae idea is to use your own data repeatedly.

 

[Denny]

I'd be happy if hops suppliers would at least print the harvest year on their packaging.

Yakima Chief does both.

 

[Denny]

So, short of us sending in samples to a lab every brew, the best we can do is guess. Too many variables between hop production to brew. Which brings us back to what @Vale71 pointed out in the second post.

Make the best guess, and if the hops aren't right, adjust the recipe next time. It's what I do anyway, so it's all good.

That's the same conclusion we came to on the podcast.