An Investigation of Vitamin Levels Status in the Serum of Children in China

Table 1

The results of method validation of VA and VE determined by HPLC and VD determined by LC-MS.

	LLQ (ng/mL)	RSD	linearity	extraction recovery/RSD
VA	40	2.74%	y=0.3037x+0.002079 (R2=0.9997)	92-103%/4.67%
VD2	0.5	3.45%	y=0.361x+0.000459 (R2=0.9958)	90-105%/5.71%
VD3	0.5	5.78%	y=0.465x+0.011 (R2=0.9943)	90-105%/6.24%
VE	30	2.89%	y=0.2923x+0.1388 (R2=0.9991)	91-104%/4.01%