Table 4. Recovery and coefficient of variation of vitamin B₁ and B₃ for SRM 3233

Component		Reference value1) (mg/100 g)	Analysis value (mg/100 g)	Recovery2) (%)	Coefficient of variation (%)
Vitamin B1	Thiamin	6.02	6.32	104.9	0.11
Vitamin B3	Nicotinic acid	2.28	2.22	97.3	1.99
	Nicotinamide	79.90	79.26	99.19	0.81

Reference value is the true value provided by National Institute of Standards and Technology (NIST).
Recovery test of vitamain B₁ and B₃ is the result of the standard addition method.