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AACC International Approved Methods - AACC Method 28-41.03. Acid Hydrolysis Method for Extracting Insect Fragments and Rodent Hairs -- Light Filth in White Flour

AACC International Approved Methods

Extraneous Matter

AACCI Method 28-41.03
Acid Hydrolysis Method for Extracting Insect Fragments and Rodent Hairs -- Light Filth in White Flour

VIEW METHOD

Objective
To extract insect and hair fragments for microscopic count and defect action level evaluation. See Note 1. Flour is hydrolyzed to reduce starch and saturate non-oleophilic food products without affecting insect hair, feathers, and other oleophilic extraneous matter. Oil is mixed into solution, coating oleophilic filth particles. Filth is isolated and separated by attraction to the oil phase of the oil/aqueous mixture. The aqueous phase is drained away and discarded, isolating the oil phase in the extraction vessel with filth elements. The oil phase is drained and filtered onto ruled filter paper for microscopic examination.