2015.14 Vitamin B (July 2018)

2015.14 (JULY 2018) BVit-02 AOAC_Niacin_Tot_MLT- AOAC_BlindDup_410057652Z

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AOAC International Interlaboratory Study Workbook

Version:

2.1

Blind (Unpaired) Replicates Study Reported Values

Seq.

Item

Symbol

Value

AOAC 2015.14 Simultaneous Determination of Total Vitamins B1, B2,

Study name: Study date: Sample ID:

24-Jul-2018

410057652Z - KDOX966/ATAN351

1 Total number of laboratories 2 Total number of replicates

p

10 20

Sum(n(L)) XBARBAR

3 Overall mean of all data (grand mean) 4 Repeatability standard deviation 5 Reproducibility standard deviation 6 Repeatability relative standard deviation 7 Reproducibility relative standard deviation

6.6083 0.3621 0.5474

s(r) s(R)

RSD(r) RSD(R)

5.48 8.28

8 HORRAT value

0.34