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K L Choi S S Que Hee R G Sutherland 《Journal of environmental science and health. Part. B》1976,11(2):175-183
2,4-D levels in the South Saskatchewan River near Saskatoon in 1973 at the height of the spraying season, and at harvestime, were determined by a method involving direct glc analysis, ankaline hydrolysis, followed by n-butylation of the liberated free acid after acidification of the alkaline solution, and confirmed by subsequent n-octylation. GC/MS also confirmed the presence of 2,4-D. 2,4-D was detected during the spraying season but not at harvest time or in river mud samples. The average level was ca. 2mug of acid equivalent to 2,4-D per liter of river water at the height of the spraying season. 相似文献
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地理信息系统(GIS)是处理资源、环境等多种信息的计算机数据管理系统。本文介绍了6IS技术在全国土壤污染状况调查工作中调查点位的布设、现场定位采样、调查数据存储等方面的应用,并探讨该技术在今后土壤污染防治工作中的应用。 相似文献