R e s t e k
FlyAshRoundRobinSamples
>110 laboratories participating
DB-5
DB-225 RTX-DIOXIN MEDIAN MEAN
AshA
250
21
30
28
32
AshB
2100
300
378
390
390
AshC
170
19
28
27
32
All results reported as pg/g
Median andMean agreement gives good confidence in “true” value
