<p>There was a <a href="https://cooking.stackexchange.com/questions/1927/how-can-you-measure-the-caffeine-content-of-a-liquid-at-home">similar question</a> on the Cooking SE site. Perhaps you can try the approach suggested by Adam Shiemke in the accepted answer. He recommended using ethyl acetate and performing a little home science experiment as detailed <a href="http://www.scienceteacherprogram.org/chemistry/Paul00-2.html" rel="nofollow noreferrer">here</a>.</p>

CC BY-SA 3.0
2014-12-03T20:59:51.070Z
2014-12-03T20:59:51.070Z
2017-04-13T12:33:38.297Z
Alex A.
<p>I recently got a winter sampler pack by Sierra Nevada, which had 3 Coffee Stout beers. I've also brewed my own coffee stout for early next year. I was wondering, having tried both, they both have a decent coffee taste, but is there any home science way to find the caffeine content of a coffee beer.</p>

<p>FWIW my homebrew was "dry hopped" with 6 ounces of coffee grounds for two weeks, in a 5gal batch. Not sure if that can help with any calculations.</p>

<p>Let me know if this is off topic, and I can move it to the homebrew SE, or even maybe the chemistry or cooking stack.</p>

CC BY-SA 3.0
2014-12-03T20:51:58.843Z
Do you have a [spectrophotometer](http://www.jenway.com/adminimages/A09_010A_Determination_of_Caffeine_in_Beverages_using_UV_Wavelength_Spectroscopy(1).pdf)?
Alex A.
CC BY-SA 3.0
2014-12-09T13:41:32.603Z
I suspect the alcohol content of the beer would throw off basic attempts to measure the caffeine.
Tom Brendlinger
<specialty-beers><stout>
How to measure the caffeine content of a coffee beer at home?
CDspace
# How to measure the caffeine content of a coffee beer at home?

(Asked by: username_0 on 2014-11-26)

I recently got a winter sampler pack by Sierra Nevada, which had 3 Coffee Stout beers. I've also brewed my own coffee stout for early next year. I was wondering, having tried both, they both have a decent coffee taste, but is there any home science way to find the caffeine content of a coffee beer.

FWIW my homebrew was "dry hopped" with 6 ounces of coffee grounds for two weeks, in a 5gal batch. Not sure if that can help with any calculations.

Let me know if this is off topic, and I can move it to the homebrew SE, or even maybe the chemistry or cooking stack.

**Tags:** specialty-beers, stout

> **Comments:**
> **username_1**: Do you have a [spectrophotometer](http://www.jenway.com/adminimages/A09_010A_Determination_of_Caffeine_in_Beverages_using_UV_Wavelength_Spectroscopy(1).pdf)?  
> **username_2**: I suspect the alcohol content of the beer would throw off basic attempts to measure the caffeine.  

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## 1 answers

### Answer by username_1 on 2014-12-03. Score: 4 | Accepted answer

There was a [similar question](https://cooking.stackexchange.com/questions/1927/how-can-you-measure-the-caffeine-content-of-a-liquid-at-home) on the Cooking SE site. Perhaps you can try the approach suggested by Adam Shiemke in the accepted answer. He recommended using ethyl acetate and performing a little home science experiment as detailed [here](http://www.scienceteacherprogram.org/chemistry/Paul00-2.html).


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