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首页> 外文期刊>Environmental Science & Technology >Pesticide Stability Studies upon Storage in a Graphitized Carbon Black Extraction Cartridge
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Pesticide Stability Studies upon Storage in a Graphitized Carbon Black Extraction Cartridge

机译：储存在石墨化炭黑萃取柱中的农药稳定性研究

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摘要

The stability of 34 selected pesticides extracted from water onto the graphitized carbon black (GCB) surface was evaluated undervarious storage conditions. The best results were obtained by first minimizing the water content into the GCB extraction cartridge by a suitable methanol washing and then freezing the cartridge. Under these conditions and over a storage period of 3 weeks, the stability of pesticides extracted from four river water samples onto the GCB surface was assessed and compared with that in water at 4℃ with and without an inhibitor of biological degradation, such as HgCl_2. Results indicated that storage on the GCB material was a far better preservation procedure than storage in water at 4℃. Several of the pesticides considered were completely degraded when stored in water in the presence of HgCl_2.
机译：在各种储存条件下，评估了从水中提取的34种选定农药在石墨化炭黑（GCB）表面上的稳定性。最好的结果是，首先通过适当的甲醇洗涤，将GCB萃取柱中的水分降至最低，然后将其冷冻。在这些条件下，在3周的存储时间内，评估了从4种河水样品中提取的农药在GCB表面上的稳定性，并将其与4℃下有或没有生物降解抑制剂（如HgCl_2）的水中的稳定性进行了比较。结果表明，与在4℃的水中存储相比，在GCB材料上进行存储要好得多。当存在HgCl_2的水中储存时，所考虑的几种农药会完全降解。

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