Contents in Biota

First detection of chlorocymenes and chlorocymenenes in fish took place in a food chain study of contaminants in clean and polluted lakes of Finland [34]. Eleven roach and four pike specimens from lake Vatia 15 km downstream from a pulp mill were analyzed for persistent chlorohydrocarbons. 236 CYMS and 236CYMD were identified with authentic model substances by GC/ECD at levels near to the detection limit of 0.2 ng g. 236CYMS was detected in all fish samples and 236CYMD in three roach and one pike [34]. However, three pike from a more remote recipient and three pike from a pure reference lake also contained a trace of 236CYMS, which indicated partial air-transport [34]. 

Further analyses of chlorocymenes and cymenenes in kraft mill recipients were carried out on Kymijoki River perch and pike and Pietarsaari pike in 1993 [17,23]. Perch contained 31 ng g 1 and 32 ng g 1 lw of 25CYMS and 2356CYMS, 

---