Does anyone know why it is that you can get negative starch conversion in the brewhouse and then see starch later on in the process? I have seen it at 2 breweries that I have worked in where no starch is indicated and then further upstream in the process there is starch indicated. In both of these situations heating problems caused the mashes to cook way too hat too soon and that was the reason for lack of conversion.
In one case an iodine stain of the wort/beer showed negative for starch until the fermentation was complete, and then indicated a purple starch positive. In another case the mash and first runnings showed negative for starch and then the last runnings showed positive for starch.
If anyone has an answer please let me know!
Steve G
Quality Services Engineer, Miller Brewing
In one case an iodine stain of the wort/beer showed negative for starch until the fermentation was complete, and then indicated a purple starch positive. In another case the mash and first runnings showed negative for starch and then the last runnings showed positive for starch.
If anyone has an answer please let me know!
Steve G
Quality Services Engineer, Miller Brewing
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