Is there an analytical method for determining the amount of insoluble impurities in tallow?
Yes. The rule specifies that insoluble impurities must be measured by the method entitled “Insoluble Impurities” (AOCS Method Ca 3a-46), American Oil Chemist’s Society (AOCS), 5th Edition, 1997, or another method equivalent in accuracy, precision, and sensitivity to this method. A copy of the method may be obtained from the AOCS (http://www.aocs.org), or viewed at the FDA Center for Food Safety and Applied Nutrition’s Library or at the National Archives and Records Administration. [See 589.2001(b)(1)(vi)(B)] 54. Q: What is the analytical variation (AV) for samples analyzed using the AOCS method? AAFCO does not list an acceptable analytical variation (AV) for insoluble impurities. Will acceptable variation for comparing results from different labs be developed? Will FDA verify suitability of labs, methods used, and results? A: FDA has not established an AV for this analytical method. FDA welcomes any information indicating that variation in test results is presenting difficulties in est
