Preservation of organophosphorous pesticides in water samples.
Four techniques were studied for capacity to preserve sixteen organophosphorous pesticides in distilled water and in creek water. A technique using chloroform effectively preserved all sixteen pesticides for the three weeks of the study and refrigeration was effective for fourteen of the pesticides, but buffers of pH 4 and pH 7 appeared undependable as preservatives.
D002725:Chloroform; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000032:analysis*; D008722:Methods; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D012034:Refrigeration; D014867:Water
D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D014867:Water; D002725:Chloroform