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The material remaining after this extended,
multiple-wash process was coagulated with 200 mL of ether,
and the resulting suspension was filtered over a PTFE membrane
with a 0.45 m pore size. The solid obtained on the filter was
vacuum-dried overnight at room temperature, ÕâÊÇÎÒÔÚÒ»ÆªÖÆ±¸Ñõ»¯Ê¯Ä«µÄÎÄÏ×ÀïÃæ¿´µ½µÄ£¬²»Ì«¶®£¬ÓÐË­ÖªµÀÕâ¶ÎÀïÃæÑõ»¯¼°ÇåÏ´Ö®ºóÔÙÓÃÒÒÃÑÄý½áÓÐʲôÓÃ;°¡£¿
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