Hello all,
Looking for feedback on experience doing iodine test on grain-in mashes. Have read the husk can cause false positive. Having used recommended dosage, temp ranges, and hold time and still not getting negative starch test results (using commercial enzymes). I use a hammer mill with 1/16th screen. Have considered taking a sample and essentially sparging or rinsing it through a fine screen (coffee filter) and doing starch test on the run off. Photo is of cooled sample after 2 hours rest at 135F with glucoamylase. Still very dark purple.