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Результаты 161-170 из 184
Air pollution and plant life
2002
Bell, J. N. B. | Treshow, Michael
Parameters identification and uncertainty analysis for environmental model
2002
Liu Yi | Chen, J. | Du, P.F.
Environmental indicators in economic models : technical information and policy implications
2002
Komen, M.H.C.
Groundwater pollution through agricultural practices and agro industries in India. IWMI-TATA Water Policy Research Program Annual Partners' Meet, 2002
2002
Bhatnagar, P.R. | Sharma, Bharat R.
Handbook of air pollution prevention and control
2002
Cheremisinoff, Nicholas P.
Trace gas emissions from German agriculture as obtained from the application of simpler or default methodologies Полный текст
2002
Dämmgen, Ulrich | Grünhage, Ludger
Determination of etoxazole in agricultural products by GC/MS
2002
Tsukioka, T. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Terasawa, J. | Sato, M.
A method by GC/MS has been established for the determination of Etoxazole in agricaltural products. Etoxazole was decomposed by acid contained in citrus fruits, but this decomposition could be prevented by addition of sodium acetate solution and extraction above pH 4. In the present method, the Etoxazole in agricultural products was extracted with acetone above pH 4, concentrated, and reextracted with n-hexane. After partition with acetonitrile followed by chromatographic clean-up with Florisil, the sample was subjected to GC/MS. The present method is excellent in sensitivity and has a detection limit of 0.002 micro g/g, and thus is about 10 times as sensitive as that of GC-NPD. The recovery by the present method is over 85% except for tea, the C.V. of recovery is less than 8%, and the method is applicable to actual samples.
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2002
subh,A.M.
Diffuse/non-point pollution and watershed management | Proceedings of the 5th International Conference on Diffuse Pollution | Proceedings of the fifth International Conference on Diffuse Pollution | Water science and technology
2002
Burkart, M. R. | Heath, R.
Concentration of volatile organic compounds in indoor air of private houses in Nagano prefecture [Japan]
2002
Yamashita, A. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Yamaura, Y. | Koyama, K. | Komiyama, S.