Author Topic: water analysis for coffee  (Read 1050 times)

Offline homoeccentricus

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water analysis for coffee
« on: February 23, 2015, 12:48:57 PM »
OK, coffee is not a fermentable, but still, we brew it, don't we? So maybe some people here can help me. I want to create a water profile that is ideal for coffee. The SCAA gives the following "ideal" characteristics:

http://www.scaa.org/chronicle/2013/07/08/dissecting-scaas-water-quality-standard/

Basically,

TDS                        150mg/L
calcium hardness       68 mg/L
total alcalinity            40 mg/L
pH                              7 (that's an easy one  :P )
sodium                      10 mg/L
 
Is there a spreadsheet that could calculate for me how to get to this profile from - say - mineral water?
Any other way to get there?
Frank P.

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Offline Wort-H.O.G.

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Re: water analysis for coffee
« Reply #1 on: February 23, 2015, 12:58:51 PM »
never seen one but there must  be. i cant use my well water for coffee...PH and sodium way too high as measured in the cup.

My RO water makes a great cup of coffee. TDS about 9-11 and PH 5.8-6.
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Offline majorvices

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Re: water analysis for coffee
« Reply #2 on: February 23, 2015, 01:10:42 PM »
Starbucks doesn't make great coffee but they do use RO water on all their coffee. Not sure if they add any minerals back.

Offline homoeccentricus

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Re: water analysis for coffee
« Reply #3 on: February 23, 2015, 01:20:55 PM »
Starbucks doesn't make great coffee but they do use RO water on all their coffee. Not sure if they add any minerals back.

I'm sure they re-add minerals to the RO water. Many smaller coffee bars do that.
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Offline Stevie

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Re: water analysis for coffee
« Reply #4 on: February 23, 2015, 02:08:56 PM »

Starbucks doesn't make great coffee but they do use RO water on all their coffee. Not sure if they add any minerals back.
It's a consistency thing for them. They want each venti non-fat double sugar barely a drop of coffee milk shake to taste the same where ever you are.

Offline HoosierBrew

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Re: water analysis for coffee
« Reply #5 on: February 23, 2015, 02:18:10 PM »
It's a consistency thing for them. They want each venti non-fat double sugar barely a drop of coffee milk shake to taste the same where ever you are.

+1.   And $5+ milk shakes at that.   ;)
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Offline Jimmy K

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Re: water analysis for coffee
« Reply #6 on: February 23, 2015, 02:24:10 PM »
It's a water profile like any other, so I can't imagine why Bru'n water or any other water calculator shouldn't be able to help. Just plug in the water you have and desired result and it will tell you how to get there.
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Offline HoosierBrew

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Re: water analysis for coffee
« Reply #7 on: February 23, 2015, 02:25:17 PM »
It's a water profile like any other, so I can't imagine why Bru'n water or any other water calculator shouldn't be able to help. Just plug in the water you have and desired result and it will tell you how to get there.

Black Balanced ?
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Offline majorvices

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Re: water analysis for coffee
« Reply #8 on: February 23, 2015, 02:28:43 PM »

Starbucks doesn't make great coffee but they do use RO water on all their coffee. Not sure if they add any minerals back.
It's a consistency thing for them. They want each venti non-fat double sugar barely a drop of coffee milk shake to taste the same where ever you are.

Sure, but I'm also sure they try to get the water to make their burnt coffee taste as good as possible. Might be a good starting point to know exactly what they do.

Not gonna lie, there have been a few times when I have been road tripping that I have been very pleased to find a star bucks near by.

Offline Stevie

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Re: water analysis for coffee
« Reply #9 on: February 23, 2015, 02:48:43 PM »

Not gonna lie, there have been a few times when I have been road tripping that I have been very pleased to find a star bucks near by.
No doubt. Cleanest bathrooms around. I have driven a few miles off highway to get to Starbucks to avoid nasty gas station bathrooms.

Offline majorvices

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Re: water analysis for coffee
« Reply #10 on: February 23, 2015, 02:50:22 PM »

Not gonna lie, there have been a few times when I have been road tripping that I have been very pleased to find a star bucks near by.
No doubt. Cleanest bathrooms around. I have driven a few miles off highway to get to Starbucks to avoid nasty gas station bathrooms.

Also, their coffee is better than gas station coffee. And McDonalds coffee. But +1 to clean bathrooms!

Offline homoeccentricus

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Re: water analysis for coffee
« Reply #11 on: February 23, 2015, 02:52:00 PM »
*$$ is not the issue here, dudes.  I'm talking about adding minerals to water.
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Offline HoosierBrew

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Re: water analysis for coffee
« Reply #12 on: February 23, 2015, 02:54:04 PM »

Not gonna lie, there have been a few times when I have been road tripping that I have been very pleased to find a star bucks near by.
No doubt. Cleanest bathrooms around. I have driven a few miles off highway to get to Starbucks to avoid nasty gas station bathrooms.

Also, their coffee is better than gas station coffee. And McDonalds coffee. But +1 to clean bathrooms!

+2.  I actually buy a few of their varieties of whole beans, just hate paying  $5+ for a large cup of cream and sugar. Maybe not the best coffee anywhere, but pretty good - definitely better than gas station or McD's.
Jon H.

Offline Stevie

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Re: water analysis for coffee
« Reply #13 on: February 23, 2015, 03:06:46 PM »
I did a quick google search and many were saying that RO is good as the beans add many minerals on their own. Maybe a bit of calcium and sodium would improve the brew. Maybe add a bit of CaCl and touch of table salt?

Offline homoeccentricus

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Re: water analysis for coffee
« Reply #14 on: February 23, 2015, 03:31:45 PM »
I did a quick google search and many were saying that RO is good as the beans add many minerals on their own. Maybe a bit of calcium and sodium would improve the brew. Maybe add a bit of CaCl and touch of table salt?

Yes, but how much is a "bit"? And how about 40 mg/L alkalinity? Add a "bit" of baking soda?

TBH, I AM a coffee nut, roast my own beans, despise *$$, etc., but this is really a science project for my son (who is in fourth grade): he wants to do a triangle test with coffees made with regular mineral (or maybe RO) water, water with minerals off the charts, and "ideal" mineral water. Like father like son.  8)
Frank P.

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