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5Â¥2010-08-19 09:12:31
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2Â¥2010-08-18 15:26:05
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koria0727(½ð±Ò+1):¶àл²ÎÓë¡£ 2010-08-19 07:36:51
icewolf7388(½ð±Ò+1): 2010-08-19 16:14:33
koria0727(½ð±Ò+1):¶àл²ÎÓë¡£ 2010-08-19 07:36:51
icewolf7388(½ð±Ò+1): 2010-08-19 16:14:33
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junjun517(½ð±Ò+2):лл²ÎÓë 2010-08-19 08:43:24
icewolf7388(½ð±Ò+3): 2010-08-19 16:14:45
junjun517(½ð±Ò+2):лл²ÎÓë 2010-08-19 08:43:24
icewolf7388(½ð±Ò+3): 2010-08-19 16:14:45
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Çë²Î¿¼uspÒÔÏÂÂÛÊö Where the monograph specifies that the specimen under test is hygroscopic, use a dry syringe to inject an appropriate volume of methanol, or other suitable solvent, accurately measured, into a tared container, and shake to dissolve the specimen. Using the same syringe, remove the solution from the container and transfer it to a titration vessel prepared as directed for Procedure. Repeat the procedure with a second portion of methanol, or other suitable solvent, accurately measured, add this washing to the titration vessel, and immediately titrate. Determine the water content, in mg, of a portion of solvent of the same total volume as that used to dissolve the specimen and to wash the container and syringe, as directed for Standardization of Water Solution for Residual Titrations, and subtract this value from the water content, in mg, obtained in the titration of the specimen under test. Dry the container and its closure at 100 for 3 hours, allow to cool in a desiccator, and weigh. Determine the weight of specimen tested from the difference in weight from the initial weight 4of the container. µ±¸÷ÂÛÖ¸Ã÷ÑùÆ·ÔÚ²âÊÔÌõ¼þϾßÓÐÒýʪÐÔʱ£¬Ê¹ÓÃÒ»¸ö¸ÉÔïµÄ×¢ÉäÆ÷×¢ÈëºÏÊÊÌå»ýµÄ¼×´¼»òÆäËûºÏÊʵÄÈܼÁ£¬×¼È·²âÁ¿£¬ÖÁÒ»¸öÈ¥ÁËÆ¤ÖصÄÈÝÆ÷ÖУ¬ÕñҡʹÑùÆ·Èܽ⡣ʹÓÃͬһעÉäÆ÷£¬´ÓÈÝÆ÷ÖÐÒÆÈ¡ÈÜÒº×ªÒÆÖÁ°´¹æ³Ì×¼±¸µÄµÎ¶¨ÈÝÆ÷ÖС£Óõڶþ²¿·ÖµÄ¼×´¼»òÆäËûºÏÊʵÄÈܼÁÖØ¸´ÉÏÊö²Ù×÷£¬×¼È·²âÁ¿£¬½«ÕâÒ»²¿·ÖÏ´µÓÎï¼ÓÖÁµÎ¶¨ÈÝÆ÷ÖУ¬Á¢¼´µÎ¶¨¡£Èç»ØµÎ¶¨·¨Ë®ÊÔ¼ÁµÄ±ê¶¨Ëùʾ£¬²â¶¨ÓëÈܽâÑùÆ·ºÍÇåÏ´ÈÝÆ÷Óë×¢ÉäÆ÷ÏàͬÌå»ýµÄµÄÈܼÁµÄË®µÄº¬Á¿£¬ÒÔmg¼Æ£¬È»ºó´Ó´ý²âÑùÆ·µÎ¶¨»ñµÃµÄË®µÄº¬Á¿Öп۳ýµôÕⲿ·ÖÖµ£¬ÒÔmg¼Æ¡£ÔÚ100¡æ£¬¸ÉÔïÈÝÆ÷ºÍËüµÄÈû×Ó3Сʱ£¬¸ÉÔïÆ÷ÖзÅÀ䣬³ÆÖØ¡£ÓëÈÝÆ÷³õʼµÄÖØÁ¿µÄ²îÖµ¾ÍÊDzâÊÔÑùÆ·µÄÖØÁ¿¡£ |
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