a method for isolating an environmentally hazardous organic contaminant from a fluid utilizes a solid phase extraction medium comprises a ptfe fibril matrix , and sorptive particles enmeshed in said matrix comprising more than 30 and up to 100 weight percent of porous organic particles , and less than 70 to 0 weight percent of porous inorganic particles , the ratio of sorptive particles to ptfe being in the range of 40 : 1 to 1 : 4 by weight . the extraction medium is useful in pesticide , phenolics , and residue of explosives separations . the separations can be efficiently performed in a stacked disk format .