DUPLICATE SPLIT SAMPLES FOR INTERNAL QUALITY-CONTROL IN ROUTINE WATERMICROBIOLOGY

Authors
LIGHTFOOT NF TILLETT HE BOYD P EATON S
Citation
Nf. Lightfoot et al., DUPLICATE SPLIT SAMPLES FOR INTERNAL QUALITY-CONTROL IN ROUTINE WATERMICROBIOLOGY, Letters in applied microbiology, 19(5), 1994, pp. 321-324
Citations number
NO
Categorie Soggetti
Microbiology,"Biothechnology & Applied Migrobiology
Journal title
Letters in applied microbiology → ACNP
ISSN journal
02668254
Volume
19
Issue
5
Year of publication
1994
Pages
321 - 324
Database
ISI
SICI code
0266-8254(1994)19:5<321:DSSFIQ>2.0.ZU;2-I
Abstract
In the microbiological examination of water, indicator organisms are s ought by membrane filtration of 100-ml sub-samples of water. The same sample cannot be examined twice but the use of split samples, where tw o 100-ml sub-samples from the same batch are processed, has been explo red. Binomial theory was used to determine the 95% confidence interval s for the results obtained. Two sets of 50 results were assessed by th e method and the resulting control charts are illustrated.