Table 5: Total selenium contents found in standard reference material for both flow systems. Total selenium contents found in standard reference material and comparison with reference value by Student’s 𝑡 -test. s: standard deviation. 𝑡 ( 0 . 0 5 , 4 ) = 2 . 7 8 [33].
Certified reference materialCertified value
(mg kg−1)		MCFA found (mean ± s)
(mg kg−1) ( 𝑛 = 5 )		FIA found (mean ± s) )
(mg kg−1) ( 𝑛 = 5 )		 𝑡 -experimental
NIST 1846
(infant formula)		0.08 (*)0.0807 ± 0.0075 0 . 0 8 2 3 ± 0 . 0 0 6 5 0.81 (FIA)
0.21 (MCFA)
(*) NIST information value. All the results are expressed in dry basis.