. 2012 Feb 22;17(2):2219–2230. doi: 10.3390/molecules17022219

Table 1.

Intra- and inter-days precision and accuracy/recovery (%) in the quantification of vitamins A, C and E extracted from experimental formulations.

Vitamin derivative	Theoretical concentration (μg·mL⁻¹)	Intra-day			Inter-day
Vitamin derivative	Theoretical concentration (μg·mL⁻¹)	Obtained concentration ± S.D.^a (μg mL⁻¹)	Precision (R.S.D. %)	Accuracy/ recovery (%)	Obtained concentration ± S.D.^b (μg·mL⁻¹)	Precision (R.S.D. %)	Accuracy/ recovery (%)
A	250	243.13 ± 3.26	1.34	97.26	243.43 ± 3.26	1.34	97.37
C	250	277.68 ± 7.05	2.54	111.07	276.00 ± 6.68	2.42	110.40
E	250	276.34 ± 5.36	1.94	110.54	275.23 ± 5.68	2.06	110.09

^a Standard deviation (intra day n = 6); ^b Standard deviation (inter day n = 18).