National Homebrew Club Ireland

Do you perform one of these to test for starches at the end of your Mash?
http://www.homebrewtalk.com/wiki/index.php/Iodine_test

Never tried, should I?

Always

no

Looks like something I should be doing............. Efficiency and Conversions!! 

I used to, then I lost the iodine, buy I also feel no need anymore.

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Ditto here regarding the lost Iodine bottle. Now you made me start thinking where it is now so I better have another coffee and start the search ::)

I always do one whenever I divert from a 'standard mash' ( 90 mins at 65C)

only did one out of curiosity, would do one if i was doing anything majorly different.  loads of speciality grain or not using MO

Quote from: Tubomyces on February 04, 2014, 11:36:28 AM
Can we use those iodine tablets Fianna Fail sent out in 2002 to save us from nuclear attack?

Did you not take them just in case?

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I used to use Iodophor as a tester. Gave a very clear indication of "mash is done". I don't bother with it any more though: I ran out of Iodophor and Starsan is useless for doing an iodine test. ???

I think i might have a ml or 500 of Videne around somewhere  :P ;D

I'm surprised more people aren't doing the starch conversion test. I usually get negative results on the first couple of samples I take after an hour has passed. It's cheap and simple to do...only drawback is that it will extend your brew day.

It's a pain in the neck specially with stouts,porters and other non blond beers :/
To see test results you should add roasted/dark malts after getting positive iodine result.

I've used a white plate to test dark mashes. I put a drop of dark wort on the while plate a a separate drop of iodine. I swirl these together and if there is starch present, even for the darkest mashes, it will show purple against the white plate.

Good to know, thank for the tip :)

Another tip is to use a piece of chalk to do the test on. It works like a sponge and the results are pretty clear.

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