Division 9.1 Statistical results of the interlaboratory test

United Kingdom

The following data were obtained from an international method performance study carried out to internationally agreed procedures [1] [2].

Year of interlaboratory test	1 997
Number of laboratories	10
Number of samples	4

Samples	A	B	C	D
Sample types
A Brandy; blind duplicaties. B Rum; split levels. C Grappa; split levels. D Aquavit; split levels.
Number of laboratories retained after eliminating outliers	9	9	8	9
Number of outliers (laboratories)	1	1	2	—
Number of accepted results	18	18	16	18
Mean value ( $\times^{-}$ ) g/l	9,0	9,1	10,0	11,8
Mean value ( $\times^{-}$ ) g/l		7,8	9,4	11,1
Repeatabilities standard deviation (S_r) g/l	0,075	0,441	0,028	0,123
Repeatabilities relative standard deviation (RSD_r) (%)	0,8	5,2	0,3	1,1
Repeatabilities limit (r) g/l	0,2	1,2	0,1	0,3
Reproductibility standard deviation (S_R) g/l	0,148	0,451	0,058	0,21
Reproductibility relative standard deviation (RSD_R) (%)	1,6	5,3	0,6	1,8
Reproductibility limit (R) g/l	0,4	1,3	0,2	0,6