They sell these perfectly characterized SRM samples of peanut butter to researchers and manufacturers so they can calibrate their equipment. Essentially, the buyer knows that their equipment is working properly if, when they run the standard peanut butter, they get the values NIST supplies on the certificate.

Source and Preparation: SRM 2387 is creamy peanut butter containing roasted peanuts, sugar, partially hydrogenated vegetable oils (48 % rapeseed, 40 % cottonseed, and 12 % soybean oil), and salt, and was prepared for NIST as part of a larger production run.

U.S. Grade A or U.S. Fancy is the quality of peanut butter that has a good color, that has a good consistency, that is practically free from defects, that has a good flavor and good aroma, that has uniform dispersion of any added ingredient(s), and that scores not less than 90 points when scored in accordance with the ...

SRM 2387 Peanut Butter - This Standard Reference Material (SRM) is intended primarily for use in validating methods for determining proximates, fatty acids, calories, vitamins, elements, amino acids, aflatoxins, and acrylamide in peanut butter and similar matrices.