Division C.5.1 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 | 12 |
| Number of samples | 6 |
| Sample types | ||||||
| A Fruit liqueur; split level (*). Brandy; blind duplicates. Whisky; blind duplicates. Grappa; split level (*). Aquavit; split level (*). Rum; split level (*). | ||||||
| Samples | A | B | C | D | E | F |
|---|---|---|---|---|---|---|
| Number of laboratories retained after eliminating outliers | 12 | 10 | 11 | 12 | 11 | 9 |
| Number of outliers (laboratories) | — | 2 | 1 | — | 1 | 2 |
| Number of accepted results | 24 | 20 | 22 | 24 | 22 | 18 |
| Mean value ( ) % vol | 23,8 | 40,09 | 40,29 | 39,26 | 42,38 | 57,16 |
| 26,51 (*) | 43,09 (*) | 45,89 (*) | 63,44 (*) | |||
| Repeatability standard deviation (Sr) % vol | 0,048 | 0,065 | 0,042 | 0,099 | 0,094 | 0,106 |
| Repeatability relative standard deviation (RSDr) (%) | 0,19 | 0,16 | 0,1 | 0,24 | 0,21 | 0,18 |
| Repeatability limit (r) % vol | 0,13 | 0,18 | 0,12 | 0,28 | 0,26 | 0,3 |
| Reproducibility standard deviation (SR) % vol | 0,06 | 0,076 | 0,073 | 0,118 | 0,103 | 0,125 |
| Reproducibility relative standard deviation (RSDR) (%) | 0,24 | 0,19 | 0,18 | 0,29 | 0,23 | 0,21 |
| Reproducibility limit (R) % vol | 0,17 | 0,21 | 0,2 | 0,33 | 0,29 | 0,35 |