Fig. 1.

AOAC Food Composition Triangle with food-matrix CRMs located based on protein, fat and carbohydrate content. Symbol code: ● Existing CRMs, ◆ Estimate of position for existing CRMs, and ∘ In progress CRMs. Color Code: Green—NIST SRMs with organic nutrients only; Black—NIST SRMs with organic and element nutrients; Red—NIST SRMs with element nutrients only; and Blue—Non-NIST CRMs. The following CRMs are included: (Sector 1) SRM 3274 Botanical Oils, SRM 3275 Fish Oils, SRM 3277 Krill Oil, SRM 3278 Edible Oil, BCR-122 Margarine, BCR-162R Soya-Maize Oil Blend, BCR-163 Beef-Pork Fat Blend, BCR-519 Anhydrous Butter Fat, BCR-632A Pure Butter Fat, and BCR-632B Adulterated Butter Fat; (Sector 2) SRM 2384 Baking Chocolate and SRM 2386 Avocado Powder; (Sector 3) SRM 2387 Peanut Butter; (Sector 4) SRM 1546a Meat Homogenate and SRM 1845a Whole Egg Powder; (Sector 5) SRM 2383a Baby Food Composite, SRM 3232 Kelp Powder, SRM 3233 Fortified Breakfast Cereal, SRM 3253 Yerba Mate, SRM 3287 Blueberry (Fruit), BCR-121 Wholemeal Flour, BCR-431 Brussels Sprouts, and BCR-485 Mixed Vegetables; (Sector 6) SRM 1548a Typical Diet, SRM 1549a Whole Milk Powder, SRM 1577c Bovine Liver, SRM 1849a Infant/Adult Nutritional Formula, SRM 1869 Infant/Adult Nutritional Formula II, SRMs 1953/1954 Human Milk, ERM-BD600 Milk Powder, GBW 10037 Infant Formula, GBW 100227 Infant Formula, and KRISS 108-02-003 Infant Formula; (Sector 7) SRM 1566b Oyster Tissue, SRM 2385 Slurried Spinach, SRM 3234 Soy Flour, SRM 3235 Soy Milk, and SRM 3290 Dry Cat Food; (Sector 9) SRMs 1946/1947 Fish Tissue, SRM 1974c Mussel Tissue, and SRM 3252 Protein Drink Mix