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| The 1993 QUASIMEME laboratory-performance study: chlorobiphenyls in fish oil and standard solutions |  |
| Wells, D.E.; de Boer, J. (1994). The 1993 QUASIMEME laboratory-performance study: chlorobiphenyls in fish oil and standard solutions Mar. Pollut. Bull. 29(4-5): 174-84 |
| In: Marine Pollution Bulletin. Macmillan: Oxford. ISSN 0025-326X, meer |
| Trefwoorden |
Bio-accumulatie; Chemische analyse; Fish oils; Gechloreerde koolwaterstoffen; Informatiediensten; Informatieverwerking; Information systems; Kwaliteitscontrole; Laboratoria; Marien milieu; Mariene vervuiling; Milieumonitoring; Performance evaluation; Pollutiemonitoring; Quality assurance; Standards; Statistische analyse; Vis; Watervervuiling (pollutie); Marien |
| Abstract |
A laboratory-performance study has been undertaken to improve the measurement of chlorobiphenyls in marine biota as part of the QUASIMEME (EU--Measurement and Testing) project. Fifty-two laboratories were invited to participate, of which 47 returned data on nine congeners in iso-octane solution and in cod liver oil. The concentration of CBs ranged between 7 and 124 mu g/kg in the oil. The robust statistical analysis gave a within-laboratory relative standard deviation from 5.7 to 14.4% and between-laboratory relative standard deviation from 17.6 to 37%. Over 60% of all errors were due to inaccurate calibration, poor GC separation and non-analytical mistakes by 13 of the laboratories. |
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