Abstract
Abstract Root beer samples were analyzed for methyl salicylate by 17 laboratories, using the official final action AOAC method, 12.046-12.051. In this method, after the sample is distilled, methyl salicylate is extracted from the distillate with chloroform, and the compound is determined by gas-liquid chromatography. Recoveries of added methyl salicylate, 0.395 mg/ml, ranged from 0.349 to 0.428 mg/ml, with an average of 0.392 mg/ml. The average standard deviation and coefficient of variation were ±0.022 and 5.69%, respectively. On the basis of this study, procedural changes were recommended for method 12.046-12.051. They have been incorporated into the 12th Edition of Official Methods of Analysis.
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