Romer Labs has introduced a new RapidCheck™ protein assay to confirm that surfaces and equipment have been cleaned. The test kit comprises strips that are impregnated with chemicals that react in the presence of amino acids or peptides. In the presence of protein and degradation products, strips will turn from yellow to blue. The detection limit is 3 micrograms and the result is available within 30 seconds. Reagents in the strips are nontoxic.