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Old 07-23-2012, 05:55 PM   #1
May 2012
Wheeling, WV
Posts: 85

I got some iodine to do the starch conversion test during my next brew, but I'm not sure it's the right stuff. It's Povidone-Iodine Solution. Will that work?
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Old 07-23-2012, 06:10 PM   #2
Misplaced_Canuck's Avatar
Jan 2011
NE Columbia SC - Formerly, Montreal Canada
Posts: 2,888
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Easiest way to tell: Try it on a known starch. Mix a tablespoon of water with a sprinkle of corn starch, apply a drop of iodine and see if it turns purple.

Originally Posted by Misplaced_Canuck
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Originally Posted by ebstauffer
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Old 07-23-2012, 06:47 PM   #3
Sep 2011
Robbinsdale, MN
Posts: 796
Liked 77 Times on 64 Posts

Should work fine, found a spec that lists that as 1% available iodine. You can dilute that further with rubbing alcohol (isopropyl alcohol) if the iodine color makes reading the starch test results difficult.

I use 1 part of idophor (1.6% iodine) to 5 parts volume of isopropyl alcohol on either use white sidewalk chalk or the edge of drywall. Apply the wort to the chalk first and the iodine solution second.

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