Table 1.

Intra-day Imprecision for Modified MTX Assay

Level	Target	Mean	SD	%CV	%Bias
1	0.05	0.050	0.004	9.43	< 0.01
2	0.12	0.121	0.010	8.22	0.83%
3	0.43	0.428	0.021	5.02	−0.47%
4	0.82	0.817	0.026	3.22	−0.37%

N = 10, Unit: μmol/L