Mini-mash conversion/iodine test?

Mini-mash conversion/iodine test?

Post by Paul Lasak » Mon, 15 Mar 1999 04:00:00



Just did my first mini mash (1/2# wheat, 3/4# Crystal 20L, 1# munich).
Procedure was bring 1.5 quarts per pound up to 160F, dump in the
(cracked)  grains, target temp of 154.  I had trouble keeping it at
154, so it mashed at 160, no higher,  for an hour.  I tested it with
orange tincure of iodine by putting a few drops of wort on a white
plate, then dropping in some iodine.  

After an hour of mashing, the iodine did not immediately turn black.
It stayed orange for few seconds, but with some agitation it slowly
started to darken.  

I did a control test with some wheat flour mixed in water.  Dropped
some iodine in it and blam, the iodine blackened immediately.

I went ahead and sparged the grain and brewed.  My gravity seemed to
come out pretty good, about .002 lower than SUDS 97 predicted.  

Was my starch converted?  Should I have used another technique?
******************************
Paul Lasakow

To reply by email, remove -- oh you know what to do.

 
 
 

Mini-mash conversion/iodine test?

Post by BigJo » Tue, 16 Mar 1999 04:00:00


Paul -

you did fine.  The darkening was probably caused by small husk particles.

Happy brewing!

John


Quote:

>Just did my first mini mash (1/2# wheat, 3/4# Crystal 20L, 1# munich).
>Procedure was bring 1.5 quarts per pound up to 160F, dump in the
>(cracked)  grains, target temp of 154.  I had trouble keeping it at
>154, so it mashed at 160, no higher,  for an hour.  I tested it with
>orange tincure of iodine by putting a few drops of wort on a white
>plate, then dropping in some iodine.  

>After an hour of mashing, the iodine did not immediately turn black.
>It stayed orange for few seconds, but with some agitation it slowly
>started to darken.  

>I did a control test with some wheat flour mixed in water.  Dropped
>some iodine in it and blam, the iodine blackened immediately.

>I went ahead and sparged the grain and brewed.  My gravity seemed to
>come out pretty good, about .002 lower than SUDS 97 predicted.  

>Was my starch converted?  Should I have used another technique?
>******************************
>Paul Lasakow

>To reply by email, remove -- oh you know what to do.

BigJohn

You know what to cut!!