AOAC Methods for Review in Codex STAN 234_11-2018

Table 986.24. Methods performance for determination of phosphorus in infant formula by spectrophotometry a AOAC Official M t ods Listed i CXS 234 for Milk and Milk Products

89

r b

R c

Mean, µ g/g

, %

, %

Infant formula

s r

s R

RSD r

RSD R

Enteral 7

541 526 447 3908 2350

18.8 19.3

3.5 3.7

52.6 54.0

RTF d soy (2 and 4) e

15.6

3.0

43.7

RTF soy

49

11

137.2 372.4 2069.2

Soy powder (1 and 5) e

94

133 739

2.4

3.4

263.2

Whey powder 3 f

31

a Based on collaborative study results of modified method. Data received from 7 laboratories were used in statistical analysis. b r = 2.8 × s r . c R = 2.8 × s R . d RTF = ready-to-feed.

e Closely matched (Youden) pairs. f Calculated including Grubb’s outlier. 10/9/2018