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Journal of Environmental Science and... 1980Nonylphenol, a major component of the Matacil (aminocarb) formulation, was mixed with insecticide diluent 585 and applied at 0.47 l/ha by a fixed-wing aircraft to a...
Nonylphenol, a major component of the Matacil (aminocarb) formulation, was mixed with insecticide diluent 585 and applied at 0.47 l/ha by a fixed-wing aircraft to a mixed coniferous forest in Algoma District, Ontario. Residues in white spruce foliage were the highest 1 h after spraying (18.90 ppm) and declined to 60% in the next two hours. After 30 days only 3% of the highest concentration recorded was observed. No detectable levels (less than 0.20 ppm) of nonylphenol were found after 62 days. No residues were detected in any forest soil sample collected after spraying. Nonylphenol residues were about 9 ppb in the stream water 1 h after its application and declined to 50% in the next two hours. Only trace amounts (less than 2.0 ppb) were detected after 5 days and no residues were detected in any water sample taken beyond this time. Residues at trace level (less than 0.10 ppm) were detected in only one sediment sample taken 4 hours after spraying.
Topics: Chromatography, High Pressure Liquid; Pesticide Residues; Phenols; Soil Pollutants; Time Factors; Water Pollutants, Chemical
PubMed: 7400540
DOI: 10.1080/03601238009372192 -
Journal of Chromatography Sep 1979A rapid and sensitive analytical technique to quantify carbamate insecticides at nanogram levels is reported using resin column and sorption, and desorption followed by...
A rapid and sensitive analytical technique to quantify carbamate insecticides at nanogram levels is reported using resin column and sorption, and desorption followed by N-P gas-liquid chromatography (GLC) analysis. The carbamates were extracted from natural water by percolation through a column of Amberlite XAD-2, followed by elution with ethyl acetate. The carbamate residues were directly analyzed by GLC with a Tracor Model 702 N-P detector. The recoveries for several carbamates including aminocarb, mexacarbate, carbaryl, propoxur, carbofuran, pirimicarb and methiocarb were from 86 to 108% at 1.0 and 0.01 ppm levels. Only 41 to 58% was recovered for methomyl. The extraction efficiency of Amberlite XAD-2 was pH-dependent as indicated in the extraction of aminocarb. More than 90% of the added aminocarb was recovered from phosphate buffer by the described method at pH 5.0 to 7.5 at 5.0 and 0.5 ppm levels.
Topics: Carbamates; Chromatography, Gas; Chromatography, Ion Exchange; Insecticides; Water; Water Pollutants; Water Pollutants, Chemical
PubMed: 536444
DOI: 10.1016/s0021-9673(00)92596-2 -
Journal of Environmental Science and... 1979Adult crayfish (Orconetes limosus) were exposed to 0.1, 1.0, 5.0, 10.0, 25.0, 30.0, 40.0, 50.0 and 60.0 ppm of aminocarb in water at 15 degrees C under laboratory...
Adult crayfish (Orconetes limosus) were exposed to 0.1, 1.0, 5.0, 10.0, 25.0, 30.0, 40.0, 50.0 and 60.0 ppm of aminocarb in water at 15 degrees C under laboratory conditions for 144 h. No apparent behavioral changes were observed in crayfish exposed to 0.1, 1.0 and 5.0 ppm of aminocarb during the experiment. Symptoms of acute toxicity were apparent at concentrations greater than or equal to 10 ppm, and mortality occurred at and above 25 ppm. The LC50, 96 h, to adult crayfish was about 33 ppm. The parent compound and its metabolites, MA (4-methylamino-m-tolyl N-methylcarbamate) and AM (4-amino-M-tolyl N-methylcarbamate), were detected in crayfish 96 h after exposure to various concentrations of aminocarb. The primary metabolite detected was MA which accounted for 75% to 95% of the body residue. The highest total residue (Aminocarb + MA + AM) was 40 ppm detected in crayfish exposed to 60 ppm of aminocarb for 96 h.
Topics: Animals; Astacoidea; Carbamates; Dose-Response Relationship, Drug; Fresh Water; Insecticides
PubMed: 512295
DOI: 10.1080/03601237909372153