Mass concentration of NP15EOdecreased 98% again after 7 days, and those of NP18EO and NP_(20)EO decreased 90% after 14days.

 
  • NP_(15)EO、NP_(18)EO、NP_(20)EO的表觀(guān)質(zhì)量濃度出現先增加再降低的現象,7天后NP_(15)EO的質(zhì)量濃度與初始相比又降到98%25,14天后NP_(18)EO和NP_(20)EO的質(zhì)量濃度又降到90%25;
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