Who Does An Iodine Test?

[Online Brewing Supplies]

Not trying to be a smatarse.

I shall rephrase that. I dont have a much of a clue about the science side of it.

See..this is the great thing about brewing. You don't have to understand how it works in great detail. Just that it does.

Sort of like the first people that accidently discovered beer.

ferment and drink. mmm..

cheers
johnno

total agree.Science just makes it better for me!

long shall we brew.mmmmmmmmmmmmm

 

[Online Brewing Supplies]

Yeah, pH is another thread, probably where I'd say homebrewers don't need to spend hundreds of dollars on pH meters either

I'm not arguing the scientific basis of your viewpoint, it's just I don't think it's an important thing for us to worry about. Get the fundamentals right and fretting over conversion ranks somewhere close to worrying about whether or not a meteor strike is going to ruin your brew day.

And some one said the earth was flat. Dont know where that came from.Ducking from meteors!

 

[Mr Bond]

Curiosity has got the better of me GB.
You are tagged as a retailer,but your profile has no links to any websites.
Are you a HBS guy or a brewer at a micro?Your level of interest in all things technical says you are more than an average backyarder.

 

[Online Brewing Supplies]

Curiosity has got the better of me GB.
You are tagged as a retailer,but your profile has no links to any websites.
Are you a HBS guy or a brewer at a micro?Your level of interest in all things technical says you are more than an average backyarder.

 

[Gerard_M]

Gerard, it is quite possible that at this stage your Iodine may well be past it's use by date. If that is the case you may need to buy another bottle. However don't become alarmed as I have heard that if you mash for 20 minutes conversion will be complete and all will be well. I wish you luck with your search for Iodine.

Cheers
Andrew

Thanks for the tip Andrew, I will grab another bottle in the next Iodine bulk-buy!
cheers
Gerard

 

[Whistlingjack]

Any maltster that is a worthy supplier will publicise the iodine test results of his product. This makes it easy to estimate the conversion time of the starch.

Therefore, with this information, its not necessary to test each time with the same malt. Having said that, its wise to conduct a test with each new malt, taking samples from the mash every five minutes.

I do it, because I can...

WJ

 

[Online Brewing Supplies]

Curiosity has got the better of me GB.
You are tagged as a retailer,but your profile has no links to any websites.
Are you a HBS guy or a brewer at a micro?Your level of interest in all things technical says you are more than an average backyarder.

I was brewing as a micro guy. I have studied brewing.I am going to do a retail thing In a few weeks (gryphonbrewing.com.au )but on a all grain basis only.And yes I am a back yarder as well.I enjoy the back yard brewing the best.So you have found me out .well done Mr Bond.

 

[Online Brewing Supplies]

Any maltster that is a worthy supplier will publicise the iodine test results of his product. This makes it easy to estimate the conversion time of the starch.

Therefore, with this information, its not necessary to test each time with the same malt. Having said that, its wise to conduct a test with each new malt, taking samples from the mash every five minutes.

I do it, because I can...

WJ

So do I! but do you trust what the malt seller (supplier) tells you ? Maltsters are different.how are your brews going?Getting cold down there,must be good for a pils.Are you at Tangle Head or back yarding?

 

[rough60]

Hey guys,
I started AG around 6 months ago, I had planned to do an iodine test with my first batch but my first AG day was so hectic that I forgot. After 2, sometimes 3, batches per week for the last 6 months, seeing this thread is the first time I've thought about it again, and probably the last.
Cheers.

edit: spelling

 

[Barry]

Good Day
I do a 90 minute mash to make sure it is all converted and have breakfast/read the paper.
A fellow home brewer tried 15 to 20 minute mashes and all converted (tasted his beers) but they were all malty with lower than normal ADA. Tasted very good but were fuller than normal for style.
I will test every blue moon and seeing there will be a blue moon tonight I better test the mashes tomorrow. :beer:

 

[SpillsMostOfIt]

I did an iodine test once and failed so dismally I decided to give up on the whole iodine thing entirely... :blink:

 

[matti]

one day ....maybe...

 

[Weizguy]

And some one said the earth was flat. Dont know where that came from.Ducking from meteors!

Is that you, Darren?

Sorry, Darren. I couldn't resist.
GryphonBrewing, you have been quite vocal lately. Are you trying you get your post count up, or are you taking it a little too seriously?
Before you get fired up, I realise that brewers are a passionate lot and I also feel the need to testify on occasion, but U gotta let people know why you are spouting copiously.

Back on topic, I performed an Iodine test yesterday with a drop of Betadine, and it was a negative result. I was hoping that I might be able to explain the excessive cloudiness of my Gose with a starch haze, but no...my conversion was good, and so was my attenuation. I'm gonna have to blame it on the low flocculation of the WLP380, and maybe the overnight/sour mash before I did the protein rest and main conversion rest.

As you say, the Iodine test indicates conversion/removal of starch and nothing else. It doesn't let you know the levels of dextrins or proteins or lipids (new word for some brewers).

However, I'd highly recommend a starch conversion test by using Iodine to all new all-grain brewers for three reasons:

• To be sure that you have made a wort that will be free of starch haze,
• To be assured that starch will not give any bugs something to eat after the yeast has attenuated the malt,
• and, the reassurance that you have fully converted your mash/grist.

Beerz
Seth