Abstract
A procedure of analysing composited samples based on predicted laboratory variance to perform an environmental toxin monitoring program with optimal costs is experimentally tested. A single population (one catch) of herring from Eastern Gulf of Finland was analyzed for organochlorines as homogenates of individuals and composites of three, five and eight specimens. Altogether 54 samples (homogenates) were analyzed. Twelve of the samples were analyzed twice to get duplicate values for calculation of the laboratory variance. The results to test the optimizing theory were obtained of 2,4,6-trichlorophenol, 2,3,4,6-tetrachlorophenol, pentachlorophenol,α-hexachlorocyclohexane, lindane, hexachlorobenzene, DDE, DDD, DDT, α-chlordane, trans-nonachlor and PCB. Distribution of the contents was found to be lognormal exept the fat contents which were normally distributed. Laboratory variance increased about exponentially with decreasing mean. Optimization procedure gave satisfactory results for nearly all residues measured. Calculated saving of costs in case of chlorohydrocarbon monitoring from the studied herrings was 53.5 % when optimized composite sampling was used instead of analysing individual specimens.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
