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Table 27. NIST SRM 1849a, Total Carnitine n = 12

Calculated Amount

Mean

SD

(mg/100g)

(mg/100g)

(mg/100g)

%RSD

r

14.8

15.3

0.44

2.9

15.6

15.5

16.0

15.4

0.81

5.3

15.8

14.5

15.0

15.0

0.10

0.7

14.9

15.1

15.7

15.4

0.26

1.7

15.2

15.3

Mean (mg/100g)

Certified Mass Fraction Mean / Range (mg/100g)

%RSD

r

15.3

NA

3.2

Recommendations

It is the recommendation of the Study Director the method is fit-for-purpose in

determining total choline and L-carnitine in infant formula and adult/pediatric nutritional

formula and that it be adopted as AOAC First Action

Official Method

status.

Acknowledgements

The Study Director would like to thank Jeff Shippar who developed the LC/MS/MS

conditions for this method. The Study Director would also like to thank Justin Gilmore

who was a major part in completing the SLV and contributing modifications to make a

more efficient and rugged method overall. Thank you to Katherine Nass, Tom Shook,

and Brian Smith who contributed to the collection of data over the course of the SLV.

Chol-08/Carn-07 (February 2016)

FOR ERP USE ONLY

DO NOT DISTRIBUTE