1. AOAC, 2000a. Ash of flour, in: Official methods of analysis (Ed), Method 923.03. Association of Official Analytical Chemists, Gaithersburg, MD, USA.
2. AOAC, 2000b. Nitrogen (total) in fertilizers, in: Official methods of analysis (Ed), Method 955.04. Association of Official Analytical Chemists, Gaithersburg, MD, USA.
3. AOAC, 2000c. Fat (crude) or ether extract in meat, in: Official methods of analysis (Ed), Method 960.39. Association of Official Analytical Chemists, Gaithersburg, MD, USA.
4. AOAC, 2000d. Protein in grains, in: Official methods of analysis (Ed), Method 979.09. Association of Official Analytical Chemists, Gaithersburg, MD, USA.
5. AOAC, 2005. Fiber (crude) in animal feed and pet food, in: Official methods of analysis (Ed), Method 962.09. Association of Official Analytical Chemists, Gaithersburg, MD, USA.