Iodine testing

[DP]

When using iodine to test mash conversion, does it matter where you take the sample from? i.e. whether from the top of the mash or from the recirculated runoff. Will sucking up a few crushed bits of grain in the pipette for the sample throw out the iodine test and will testing just the recirculated runoff be artificially removing starches due to the filtering effect of the grain bed therefore giving a false positive iodine result?

[Mike Neilson]

'eyeometer"

Why not!!