Abstract
Abstract Collaborative results are presented on a proposed method for light filth extraction from corn- and rice-based ready-to-eat breakfast cereals and corn-based snack foods. Samples are digested with hydrochloric acid, followed by wet sieving on a No. 230 mesh plain weave sieve. Sieve retainings are boiled in 40% isopropanol and filth is extracted in either a Kilborn funnel or a trap flask. Average per cent recoveries of spiked elytral fragments and rodent hairs were 91.0 and 80.0% (using trap flask) and 86.1 and 81.7 (using Kilborn funnel), respectively. The method is recommended for adoption as official first action.
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