The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform
A. S. Moskovkin - One of the best experts on this subject based on the ideXlab platform.
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Gas-chromatographic determination of 1,1-dimethylhydrazine in water
Journal of Analytical Chemistry, 2006Co-Authors: E. E. Sotnikov, A. S. MoskovkinAbstract:A gas-chromatographic procedure for the determination of 1,1-dimethylhydrazine in water was developed on the basis of its reaction with 4-nitrobenzaldehyde yielding the corresponding hydrazone, the extraction of the latter from water with an organic solvent, its subsequent preconcentration by evaporation, and the determination on a gas chromatograph with a Nitrogen-Phosphorus Detector. The determination limit of 1,1-dimethylhydrazine is 0.03 μg/L. The relative error of the determination is no larger than 22% in the concentration range 0.06–0.60 μg/L and 33% at a level of 0.03 μg/L.
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Determination of Chloropicrin in drinking water using static headspace gas-chromatographic analysis
Journal of Analytical Chemistry, 2005Co-Authors: E. E. Sotnikov, A. S. MoskovkinAbstract:A gas-chromatographic procedure was developed for determining chloropicrin in a mixture with other volatile halogen-containing compounds in drinking water with the use of a static version of headspace gas-chromatographic analysis and an electron-capture Detector. The capabilities of a Nitrogen-Phosphorus Detector connected in series with an electron-capture Detector for the reliable identification of chloropicrin in test mixtures were demonstrated.
Helen Tsoukali - One of the best experts on this subject based on the ideXlab platform.
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Headspace solid-phase microextraction for the gas chromatographic analysis of organophosphorus insecticides in vegetables.
Journal of AOAC International, 2007Co-Authors: Konstantinos Fytianos, Gregory Theodoridis, Garyfallia Drimaropoulou, Nikolaos Raikos, Helen TsoukaliAbstract:Residues of organophosphorus insecticides (diazinon, methyl parathion, fenitrothion, malathion, and parathion) were determined in 13 different vegetable matrixes by headspace solid-phase microextraction performed with a polydimethyl-siloxane fiber (100 microm). Determination was carried out by gas chromatography with a Nitrogen-Phosphorus Detector. Limits of detection and quantification were < 0.005 and 0.017 mg/kg, respectively; thus, the limits of maximum residue levels (MRLs) required by European regulations can be verified without difficulty. Pesticide residues were found in 38% of the 125 fresh commercial samples (imported and domestic) that were analyzed. Residues of methyl parathion and parathion, which were withdrawn in Greece in 2003, were detected in 36.8 and 4% of all samples, respectively. The MRLs were exceeded overall by 1%.
E. E. Sotnikov - One of the best experts on this subject based on the ideXlab platform.
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Gas-chromatographic determination of 1,1-dimethylhydrazine in water
Journal of Analytical Chemistry, 2006Co-Authors: E. E. Sotnikov, A. S. MoskovkinAbstract:A gas-chromatographic procedure for the determination of 1,1-dimethylhydrazine in water was developed on the basis of its reaction with 4-nitrobenzaldehyde yielding the corresponding hydrazone, the extraction of the latter from water with an organic solvent, its subsequent preconcentration by evaporation, and the determination on a gas chromatograph with a Nitrogen-Phosphorus Detector. The determination limit of 1,1-dimethylhydrazine is 0.03 μg/L. The relative error of the determination is no larger than 22% in the concentration range 0.06–0.60 μg/L and 33% at a level of 0.03 μg/L.
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Determination of Chloropicrin in drinking water using static headspace gas-chromatographic analysis
Journal of Analytical Chemistry, 2005Co-Authors: E. E. Sotnikov, A. S. MoskovkinAbstract:A gas-chromatographic procedure was developed for determining chloropicrin in a mixture with other volatile halogen-containing compounds in drinking water with the use of a static version of headspace gas-chromatographic analysis and an electron-capture Detector. The capabilities of a Nitrogen-Phosphorus Detector connected in series with an electron-capture Detector for the reliable identification of chloropicrin in test mixtures were demonstrated.
Jesús Simal-gándara - One of the best experts on this subject based on the ideXlab platform.
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Determination of carbamates and organophosphorus pesticides by SDME–GC in natural water
Analytical and Bioanalytical Chemistry, 2005Co-Authors: Carmen López-blanco, Sonia Gómez-Álvarez, María Rey-garrote, Beatriz Cancho-grande, Jesús Simal-gándaraAbstract:Water contamination due to the wide variety of pesticides used in agriculture practices is a global environmental pollution problem. Analytical methods with low quantification limits are necessary. The application of a new extraction technique, solvent drop microextraction (SDME), followed by gas chromatography with a Nitrogen-Phosphorus Detector, was assessed for determining carbamates and organophosphorus pesticides in natural water. Experimental parameters which control the performance of SDME such as selection of microextraction solvent, optimization of organic drop volume, effects of sample stirring, salt addition, and, finally, sorption time profiles were studied. Once SDME was optimized, analytical parameters such as linearity ( r ^2>0.99), precision (
Konstantinos Fytianos - One of the best experts on this subject based on the ideXlab platform.
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Headspace solid-phase microextraction for the gas chromatographic analysis of organophosphorus insecticides in vegetables.
Journal of AOAC International, 2007Co-Authors: Konstantinos Fytianos, Gregory Theodoridis, Garyfallia Drimaropoulou, Nikolaos Raikos, Helen TsoukaliAbstract:Residues of organophosphorus insecticides (diazinon, methyl parathion, fenitrothion, malathion, and parathion) were determined in 13 different vegetable matrixes by headspace solid-phase microextraction performed with a polydimethyl-siloxane fiber (100 microm). Determination was carried out by gas chromatography with a Nitrogen-Phosphorus Detector. Limits of detection and quantification were < 0.005 and 0.017 mg/kg, respectively; thus, the limits of maximum residue levels (MRLs) required by European regulations can be verified without difficulty. Pesticide residues were found in 38% of the 125 fresh commercial samples (imported and domestic) that were analyzed. Residues of methyl parathion and parathion, which were withdrawn in Greece in 2003, were detected in 36.8 and 4% of all samples, respectively. The MRLs were exceeded overall by 1%.