CDFA roller

Table 1 CDFA Roller and Cotton Dosimeter Measurements of Chlorpyrifos at Several Distances from a Fogger Before and After Jazzercize Activity...

Ross, J., H.R. Fong, T. Thongsinthusak, S. Margetich and R. Krieger (1991). Measured potential dermal transfer of surface pesticide residue generated from indoor fogger use using the CDFA roller method, Chemosphere, 22, 975-984. 

A short-handled modification of the CDFA (or California) roller was passed over an all-cotton dosimeter (1711 cm2) (Ross et al., 1991) to collect transferable chlorpyrifos at the University Club. All results were expressed as pg chlorpyrifos per cm2 of the collection surface. 

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