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首页> 美国卫生研究院文献>The Scientific World Journal >Application of a Developed Method for the Extraction of Triazines in Surface Waters and Storage Prior to Analysis to Seawaters of Galicia (Northwest Spain)
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Application of a Developed Method for the Extraction of Triazines in Surface Waters and Storage Prior to Analysis to Seawaters of Galicia (Northwest Spain)

机译：在分析加利西亚的海水之前开发的方法在地表水中提取三嗪并进行存储的应用（西班牙西北部）

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A simple method based on solid-phase extraction combined with liquid chromatography for simultaneous determination of nine triazine herbicides (ametryn, atrazine, cyanazine, prometryn, propazine, simazine, simetryn, terbuthylazine, and terbutryn) in surface water samples was developed and validated. Under optimized conditions, 50 mL of water sample was pumped through the Oasis HLB cartridge, and triazines were eluted with 3 mL acetone. Finally the extract was concentrated to dryness, reconstituted with 1 mL methanol : water (1 : 1) and injected into the HPLC-DAD system. The stability of the herbicides on the cartridges at −18 and 4°C was also evaluated, and the recoveries obtained after three weeks of storage were satisfactory for all compounds. The analytical features of the proposed method were satisfactory: repeatability and intermediate precision were <10% and recoveries in spiked river water and seawater samples were higher than 93% for all compounds studied. Limits of quantification (varied from 0.46 to 0.98 µg L−1) were adequately allowing the determination of these compounds at the levels requested by the 2008/105/EC Directive. Finally, this method was applied to the analysis of 50 seawater samples from Galicia (northwest Spain).
机译：建立并验证了一种基于固相萃取结合液相色谱的同时测定地表水样品中的九种三嗪除草剂（ametricn，阿特拉津，氰嗪，promethn，propazine，propazine，simazine，simetryn，terbuthylazine和terbutryn）的简单方法。在最佳条件下，将50 µmL的水样品泵送通过Oasis HLB柱，并用3 µmL的丙酮洗脱三嗪。最后，将萃取液浓缩至干，用1毫升mL甲醇：水（1：1）复溶，并注入HPLC-DAD系统中。还评估了除草剂在-18和4°C时在药柱上的稳定性，对于所有化合物，储存三周后获得的回收率令人满意。所提出方法的分析特性令人满意：所有研究化合物的重复性和中间精度均<10％，加标河水和海水样品中的回收率均高于93％。定量限（从0.46至0.98μgL -1 不等）足以按2008/105 / EC指令的要求测定这些化合物。最后，该方法用于分析来自加利西亚（西班牙西北部）的50个海水样品。

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