By Edited by Antonius Kettrup
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Extra info for Analysis of Hazardous Substances in Air
The adsorbed substance is extracted with n-butyl acetate and determined with an MSD detector after gas chromatographic separation. Quantitative evaluation is carried out using a calibration curve. The peak areas obtained using calibration standards are plotted against the fenthion concentrations. 8 or 200 µg/m3 Sampling time: 6 hours Sampled air volume: 720 L Fenthion [CAS No. 55-38-9] Fenthion is an insecticide against biting and sucking insects, in particular fruit flies and domestic pests, introduced by BAYER in 1958.
The adsorbed substance is extracted with acetonitrile and determined using a UV detector after liquid chromatographic separation. Quantitative evaluation is carried out using a calibration curve. The peak areas obtained using calibration standards are plotted against the azinphos-methyl concentrations. 7 % at concentrations of 26 or 300 µg/m3 Sampling time: 6 hours Sampled air volume: 720 L Azinphos-methyl [CAS No. 86-50-0] Azinphos-methyl, a non-systemic insecticide introduced in 1955, has a broad spectrum of action and may be applied to numerous crops.
7 % at concentrations of 26 or 300 µg/m3 Sampling time: 6 hours Sampled air volume: 720 L Azinphos-methyl [CAS No. 86-50-0] Azinphos-methyl, a non-systemic insecticide introduced in 1955, has a broad spectrum of action and may be applied to numerous crops. 1. 2 mg/m3 (2001) ± measured as the inhalable aerosol fraction. Because of the danger of absorption through the skin, azinphos-methyl has been marked with an ªHº in the List of MAK and BAT Values . Author: K. Riegner Examiner: W. 4 9 10 General principles Equipment, chemicals and solutions Equipment Chemicals Solutions Sample collection and preparation Operating conditions for high performance liquid chromatography Analytical determination Calibration Calculation of the analytical result Reliability of the method Precision Recovery rate Quantification limit Shelf-life Discussion of the method References 1 General principles To determine the levels of azinphos-methyl in the air measured air volumes are drawn through Tenax adsorption tubes by a battery-operated pump.
Analysis of Hazardous Substances in Air by Edited by Antonius Kettrup