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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Food Chem. 2010 Aug 1;121(3):912–917. doi: 10.1016/j.foodchem.2010.01.018

Figure 4. Ammonia release assays for protein.

Figure 4

Samples were tested for ammonia content as described in Materials and Methods. (A) Standard curve. (B) Ammonia detected in melamine and melamine treated with HCl. Note that the ammonia concentration in melamine was beyond the linear range of the assay. (C) Ammonia detected in cyanuric acid and cyanuric treated with HCl. (D) Ammonia assay of cat food and cat food treated with proteinase K or HCl.