AOAC Final Action Methods in 2018

for preparation of reconstituted powder, RTF, or concentrate [for samples requiring the protein precipitation steps, F ( b )–( d ), an additional factor (e.g., for 25 g sample f = 2) is needed]; 35.45 = chloride mass (in mg) corresponding to 1 mL of 1 mol/L AgNO 3 ; and 100 = mass conversion to mg/100 g. J. Precision Details of the interlaboratory test of the precision of the method are summarized in Table 2016.03 . The values derived from the interlaboratory test may not be applicable to analyte concentration ranges and/or matrices other than those given in Table 2016.03 . References: (1) ISO 1042:1998, Laboratory glassware–One-mark volumetric flasks (2) GB/T 601 (2002) Chemical reagent–Preparation of standard volumetric solutions J. AOAC Int . 99 , 1113(2016) DOI: 10.5740/jaoacint.16-0123 (First Action) J. AOAC Int . 102 , 564(2019) DOI: 10.5740/jaoacint.18-0244 (Final Action) AOAC SMPR 2014.015 J. AOAC Int . 98 , 1079(2015) DOI: 10.5740/jaoac.int.SMPR2014.015 * Method adopted by Codex as a Type II standard, by AOAC as an Official Method of Analysis SM , and by the International Organization for Standardization and International Dairy Federation as ISO 21422:2018 | IDF 242. Posted: September 7, 2016 (First Action); October 2018 (Codex); February 2019 (Final Action); August 2019 (Final Action after publication in J. AOAC Int.)

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