Spike Brewing 12.5 Conical Fermenter Giveaway!

Home Brew Forums > Home Brew Market > For Sale > For Sale - Can Determine AA% and BA% of Homegrown Hops

Reply
 
LinkBack Thread Tools
Old 07-01-2009, 09:51 PM   #1
midnightmike
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2008
Location: Horsham, PA
Posts: 3
iTrader: (0)
Default For Sale - Can Determine AA% and BA% of Homegrown Hops

I am a Biochemist in a major pharmaceutical company, but also an avid homebrewer. I am very interested in growing my own hops, but was discouraged to see that they could only be used for flavor/aroma because of lack of information on the alpha acid content.

My job is to develop analytical methods for drug products, and so I took it upon myself to find a way to determine the alpha and beta acid content in hops. I have found a published method that looks as though it will work.

My question is this: Would there be enough interest in this for it to be worthwhile for me to purchase the equipment to routinely run this analysis? Would homebrewers be willing to spend 30 bucks or so to have me analyze their hops and give them the percent alpha and beta acids? The equipment and chemicals are costly and I just wanted to know if there would be enough interest to cover the costs to run the analysis.

Please let me know if anyone has any interest in a service like this.

Thanks,
Mike

__________________
midnightmike is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2009, 03:04 PM   #2
slimer
Feedback Score: 0 reviews
 
slimer's Avatar
Recipes 
 
Join Date: Oct 2007
Location: Westmont, IL
Posts: 723
iTrader: (0)
Default

I would be interested, but the price has to fit my budget.

Many people grow hops to curtail some of the spending involved with purchasing hops. At ~$20 per pound, $30 to test hops may not be cost effective.

I personally have 4 Cascade (from 2 sources), 1 Sterling, 1 Centennial, & 1 Crystal. So to get all the types/sources tested, I would be out $150. If I took a hit like that, I would try either the hop tea or titration method.

Have you looked into the titration method? Being a former water tester myself, there is a way to take a known AA% and see how many drops in a fixed solution it takes to turn clear. Then take the unknown AA% and do the test. Simple math tells you the result.

Just a little food for though. I'm still interested if you could get the cost down more.

__________________
slimer is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2009, 03:39 PM   #3
HomerT
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2005
Location: Wixom, MI
Posts: 558
iTrader: (0)
Liked 4 Times on 3 Posts

Default

Would also help to know how much you need to run the test. In other words, if you need 4oz of hops to run the test, most here would likely not part with them. If you need a few cones...game on.

__________________
HomerT is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2009, 03:39 PM   #4
midnightmike
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2008
Location: Horsham, PA
Posts: 3
iTrader: (0)
Default

I could probably get the cost down. I need to determine how much it will cost per sample to run. The big cost would be the initial cost of equipment, but if enough people are interested, that could be solved. Also, it would be less effort to run multiple samples together so if I were to batch them together, it could be cheaper.

I'm just probing around to see if there would be enough interest to make this feasible.

__________________
midnightmike is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2009, 03:44 PM   #5
McKBrew
Feedback Score: 0 reviews
 
McKBrew's Avatar
Recipes 
 
Join Date: Oct 2006
Location: Hayden, Idaho
Posts: 8,292
iTrader: (0)
Liked 30 Times on 27 Posts
Likes Given: 8

Default

I'm sure some people would be interested. If the cost was reasonable, I might be one of them.

I have used homegrown hops for bittering. I just take the average alpha acid potential for the breed and use it or a number slightly less than average. Not very scientific, but I've been pleased with the results.

__________________

Make Beer, Not War.

McKBrew is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2009, 03:55 PM   #6
midnightmike
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2008
Location: Horsham, PA
Posts: 3
iTrader: (0)
Default

Quote:
Originally Posted by HomerT View Post
Would also help to know how much you need to run the test. In other words, if you need 4oz of hops to run the test, most here would likely not part with them. If you need a few cones...game on.
I would need less than half an ounce. The cones would need to be in the condition that you plan to use them (ie dryness because water content will affect the weight which would change the %AA calculation)
__________________
midnightmike is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2009, 04:28 PM   #7
HellenicHomeBrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2009
Location: Lancaster, PA
Posts: 131
iTrader: (0)
Default

subscribed!

__________________
Primary #1: Vanilla Cream Stout
Primary #2: All Citra IIPA
Secondary #1:
Secondary #2:
Bottled: Victory HopDevil Clone, Fat Tire Clone, Abbey Leffe Blonde
Keg: TBA
HellenicHomeBrewer is offline
 
Reply With Quote Quick reply to this message
Old 07-03-2009, 02:26 PM   #8
cuinrearview
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2008
Location: Delton, MI
Posts: 1,174
iTrader: (0)
Liked 6 Times on 5 Posts

Default

I've seen one method that my wife thought that she could duplicate in her medical lab. Could you share the process that you are thinking about using?

__________________

Looking forward to brewing some beer

cuinrearview is offline
 
Reply With Quote Quick reply to this message
Old 07-08-2009, 07:49 PM   #9
midnightmike
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2008
Location: Horsham, PA
Posts: 3
iTrader: (0)
Default

I could run either an HPLC method or a spectrophotometric method. I'm leaning towards the spectrophotometric method since it would be cheaper and provides almost as much information.

__________________
midnightmike is offline
 
Reply With Quote Quick reply to this message
Old 07-08-2009, 07:55 PM   #10
GilaMinumBeer
In yo' garage, steelin' yo parts.
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
GilaMinumBeer's Avatar
Recipes 
 
Join Date: Jan 2008
Location: Oblivion
Posts: 47,279
iTrader: (0)
Liked 4680 Times on 4339 Posts
Likes Given: 57

Default

The thought is definitley appealing but, for years in various articles sources have been published that will run these same tests. IIRC, a USDA lab will also test an ~ounce of hops for ~$35. But, I have yet to hear from ANYONE who has had this done.

I think most who have been growing have either settled on the Aroma/Flavor aspect or have thrown caution to the wind and just trial brewed a batch to determine a "perceived bitterness" and ran with that. I've grown for over 3 years now and that is what I do.

__________________
GilaMinumBeer is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Homegrown (hops) to dry hop? stinkiestbink Extract Brewing 7 09-11-2009 05:03 PM
How to determine hops, yeast, etc xxdcmast Beginners Beer Brewing Forum 5 01-06-2009 01:04 AM
How do you use homegrown hops? HBRunner Hops Growing 18 06-29-2008 12:01 PM
Homegrown Hops? schultan Recipes/Ingredients 23 12-08-2007 11:33 AM
Homegrown Hops Boston General Beer Discussion 87 08-22-2006 02:13 AM