Table 10.

Values assigned for vitamin D₂, vitamin D₃, and 25-hydroxyvitamin D₃ [25-(OH)D₃] in food and dietary supplement CRMs

SRM	Vitamin D3 Mass fraction (ng/g)	25(OH)D3
Non-fortified food matrices
SRM 1845a whole egg powder	48.8 ± 4.7a,c	12.2 ± 1.5a,c
SRM 1546a meat homogenate	2.56 ± 0.53a,d	0.90 ± 0.12a,c
SRM 1549a whole milk powder	1.88 ± 0.35a,d	0.53 ± 0.05a,d
SRM 1577c bovine liver		13.7 ± 3.1b,c
Fortified food and dietary supplement matrices
SRM 1849a infant/adult nutritional formula	111 ± 1.7a,e	ND
SRM 3532 calcium-containing solid oral dosage form	1310±33b,d	ND
	Vitamin D2 Mass fraction (ng/g)
SRM 3235 soy milk	12.0 ± 2.4a,f	ND
SRM 3280 multivitamin/multielement tablets	8600±2600b,g	ND

Number of certified, (reference/indicative), and [information] values. See Certificate of Analysis for SRMs at http://www.nist.gov/srm/index.cfm

^aMass fraction reported on as-received basis

^bMass fraction reported on dry-mass basis

^cValue assigned based on combination of results from NIST ID LC-MS/MS (with derivatization) and USDA interlaboratory study [80]

^dValue based on only NIST ID LC-MS/MS (with derivatization) results

^eValue based on results from NIST ID LC-MS, collaborating laboratories, and the manufacturer [57]

^fValue based on results from NIST ID LC-MS/MS (with derivatization) and from collaborating laboratories

^gValue based on NIST LC-MS results [44]

ND = not determined

Certified values in italic type; reference/indicative values in normal type