<li id="omoqo"></li>
  • <noscript id="omoqo"><kbd id="omoqo"></kbd></noscript>
  • <td id="omoqo"></td>
  • <option id="omoqo"><noscript id="omoqo"></noscript></option>
  • <noscript id="omoqo"><source id="omoqo"></source></noscript>
  • 發布時間:2023-07-18 16:28 原文鏈接: 鹽酸丁卡因的含量測定方法

    取本品約0.25g,精密稱定,加乙醇50ml振搖使溶解,加0.01mol/L鹽酸溶液5ml,搖勻,照電位滴定法(通則0701),用氫氧化鈉滴定液(0.1mol/D)滴定,兩個突躍點體積的差作為滴定體積。每1ml氫氧化鈉滴定液(0.1mo/L)相當于30.08mg的C5H24N2O2·HCl

    <li id="omoqo"></li>
  • <noscript id="omoqo"><kbd id="omoqo"></kbd></noscript>
  • <td id="omoqo"></td>
  • <option id="omoqo"><noscript id="omoqo"></noscript></option>
  • <noscript id="omoqo"><source id="omoqo"></source></noscript>
  • 1v3多肉多车高校生活的玩视频