I wanted to try the Iodine Starch conversion test. I bought Iodine Tincture 2% U.S.P. (first aid antiseptic) from the local pharmacy.
Never really got it to work. Even prior to sparging, the color stayed the same.
Here is a sample of the most common test.
Put wort and Iodine into one cavity each as a control sample.
Put wort into one more cavity and add a drop of Iodine and watch the reaction and compare to the original color of the Iodine/wort.
A much better method is the chalk or Kaiser method I use.
Looks like some others are just using the cleaning solution iodophor...is that correct?