Table 3. Precision of immunoaffinity-HPLC/PDA for vitamin B₇ and B₁₂ analyses

Analytes	Repeatability1)		Reproducibility2)
	Mean±SD3)(μg/100 g)	CV4) (%)	Mean±SD (μg/100 g)	CV (%)
Vitamin B7 (biotin)	33.00±1.19	3.6	32.79±1.63	4.9
Vitamin B12 (cyanocobalmin)	5.73±0.22	3.8	5.60±0.34	6.1

Repeatability refers to the results of independent 5 determination in triplicates obtained by analyzing a QC sample five times on the same day.
Reproducibility refers to the results of independent 5 determinations in triplicates obtained by analyzing a QC sample five times on different days (once a day).
Mean indicates the mean contents of biotin and cyanocobalamin in analytical quality sample, SD: standard deviation.
Coefficient variation.