2017.03 Amino Acids (Tryptophan) - Amino-02

2017.03 (JULY 2018) Amino-02 AOAC_TRP_MLT_- AOAC_BlindDup_00866RF00

FOR ERP USE ONLY DO NOT DISTRIBUTE

AOAC International Interlaboratory Study Workbook

Version:

2.1

Blind (Unpaired) Replicates Study Reported Values

Seq.

Item

Symbol

Value

Study name: Study date: Sample ID:

AOAC 2017.03 Determination of L-Tryptophan

24-Aug-2017

00866RF00 - RQXQ518/GVPE615

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

23.3818 0.5960 1.0182

s(r) s(R)

RSD(r) RSD(R)

2.55 4.35

8 HORRAT value

0.62