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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Iodine testing...
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Old 03-29-2009, 04:45 AM   #1
tndave
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Default Iodine testing...

I went to wal-mart today to get some iodine to test conversion with and they didn't have any. The pharmacist told me they didn't sell it any more because of meth dummies or some such crap. So I got something that is basically a generic betadine solution. When I tested I didn't see purple...I didn't really expect to though because I mashed for abt 75 mins instead of 45-60 because...well, just because.

So will betadine work as a test agent?

BTW...the brew day turned out great...

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Old 03-29-2009, 04:48 AM   #2
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I'd go to regular drug store and get some. Some people use iodophor sanitizer. I don't know about betadine. sorry

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Old 03-29-2009, 04:59 AM   #3
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I'm not talking abt sanitizing...I use Star San for that. I'm talking about testing to see if you have reached full conversion.

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Old 03-29-2009, 05:00 AM   #4
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Boil some flour to gelatenize it. Test this with you solution. If it turns black purple you are fine.

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Old 03-29-2009, 05:14 AM   #5
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K, Thanks will try...

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Old 03-29-2009, 12:08 PM   #6
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Quote:
Originally Posted by tndave View Post
I'm not talking abt sanitizing...I use Star San for that. I'm talking about testing to see if you have reached full conversion.
Schlenkerla is talking about Iodophor because it has iodine in it. If you can't find iodine, you can find Iodophor.
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Old 03-29-2009, 02:09 PM   #7
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Quote:
Originally Posted by Daddymem View Post
Schlenkerla is talking about Iodophor because it has iodine in it. If you can't find iodine, you can find Iodophor.
Thanks - I should have stated that iodophor has iodine.
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Old 03-30-2009, 04:00 AM   #8
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Quote:
Schlenkerla is talking about Iodophor because it has iodine in it. If you can't find iodine, you can find Iodophor.
Ok, sorry my bad.

I did the test with flour and it worked. So the sample that I took from my MLT yesterday was fully converted. Beersmith said I should have gotten 1.035 OG and I got 1.034 and this was my second ever all grain so I am pleased. That was even after having to add a half gallon of water to the finished wort because I had forgotten about the 90 min boil instead of 60 like I'm use to. It was a five gallon version of BM's Sterling Gold.
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Old 03-30-2009, 04:23 AM   #9
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Betadine ought to work, because the same compound responsible for antiseptic properties also reacts with the starches.

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Old 04-01-2009, 01:21 AM   #10
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Wal-Mart has it:
Walmart.com: Equate: Povidone-Iodine Solution, 10% Topical Microbicide Antiseptic, 8 fl oz: Medicine Cabinet

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