Table 1.

Results for control samples analyzed with milk samples.

Control Material	n	Mean Iodine (µg/ 100 g)	SD	% RSD	HorRat a	Minimum	Maximum	Previous Mean (Range, n) b	Expected c
Chocolate Milk (Control Composite II) d,e	6	41.9	1.03	2.5	0.3	40.6	43.1	40.9 (1)	n/a
2% Milk (Control Composite) d	3	32.2	0.31	0.9	0.1	31.9	32.5	n/a	n/a
NIST SRM®1849a Infant/Adult Nutritional Formula f	1	133						127 (118–134, 7)	118–140

SD = standard deviation. RSD = percent relative standard deviation. ^a Assayed RSD/expected RSD, calculated according to Horwitz and Albert [33], and described in Section 2.5. ^b For samples of material assayed with other foods for the National Food and Nutrient Analysis Program [30,31]. ^c Certified mean ± uncertainty [32]. ^d CC=control composite developed for the National Food and Nutrient Analysis Program [30]. ^e Whole chocolate milk. ^f NIST SRM=National Institute for Standards and Technology Standard Reference Material (Gaithersburg, MD, USA) [32].