Table 1.

Validation and repeatability of measurement using Hipp baby formula by HPLC

Sample name	Ret time min	Area Mv min	Height Mv	Amount ppb	% of recovery
Std 2.0 ppb	5.48	221,323	878,118	2.00001	100
Std 1.0 ppb	5.49	110,008	43,988	1.0003	100
Std 0.5 ppb	5.47	54,896	219,905	0.4985	99.7
Std 0.25 ppb	5.48	27,419	111,156	0.2504	100.16
Spiked milk
2.5 ppb (1)	5.57	55,298	246,355	2.23	89
(2)	5.57	56,604	256,889	2.33	93
(3)	5.57	59,533	27,180	2.58	103

HPLC=High-performance liquid chromatography;

min=Minutes;

Mv=Measurement unit;

Ret=Retention;

Std=Standard; 1, 2, and 3 with 2.5 ppb indicate replicate 1, 2, and 3