Alkyl polychlorofluorenes

In addition to chlorocymenes and chlorocymenenes, four groups of persistent alkylaromatk chlorohydrocarbons have been detected and characterized from chlorobleaching of pulp. They were assumed to be planar aromatic chlorocom-pounds (PLAC) because they were found in cleanup fractions of PCDDs and PCDFs after reversed elution with toluene from a carbon column [39]. PLAC groups were alkyl-polychloronaphthalenes (RPCN), alkyl-polychlorobibenzyls (RPCBB), alkyl-polychlorofluorenes (RPCFL), and alkyl-polychlorophenan-threnes (RPCPH). Among the latter, chlororetenes are most abundant [40]. 

Alkyl-polychlorofluorenes (RPCFL) were detected at sub-ng 1 1 levels in effluents, at a few ng g 1 dw levels in biosludge and < ng g 1 dw concentrations in softwood pulp product of a kraft mill. The structures were deduced from high resolution mass spectra and verified by comparison to GC/HRMS/SIM of model substance mixtures from chlorination of methyl- and dimethylfluorenes... 

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