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| Both minnocycline and rifampin were deteced under the same separation conditions.The mobile phase cinsisted of KH2PO4(60%)and acetontrile(40%)with the final pH adjutsed to ~3.25 using 85% O-phosphoric acid.The HPL system was run under an isocratic reversed-phase condition with a flow rate of 1mL/min.Detection was done at a wavelength of 339 nm. Minocycine was eluted at 1.5 min,and rifamipin was detected at 13 min .In pilot trials,known amounts of antibiotics were added to 1-cm segments of uncoated catheters and extracted as outlined above.More than 90% of both antibiotics were recovered. After construction of standard curves,antibiotic cintrols were measured with a consistent accuracy of >85%. |
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hmilywq(½ð±Ò+2): 2011-03-09 09:07:17
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Both minocycline and rifampin were detected under the same separation conditions.ÔÚÏàͬµÄ·ÖÀëÌõ¼þÏÂÎÒÃÇͬʱ·¢ÏÖÁËÃ×ŵ»·ËغÍÀû¸£Æ½¡£ The mobile phase consists of KH2PO4(60%)and acetonitrile(40%)with the final pH adjutsed to ~3.25 using 85% O-phosphoric acid. Õâ¸öÁ÷¶¯ÏàÓÉKH2PO4(60%)ºÍͨ¹ý85%µÄÑõºÏÁ×ËáÏ¡Ê͵½×îÖÕPHΪ3.25µÄÒÒëæ£¨40%£©×é³É¡£ The HPLC system was run under an isocratic reversed-phase condition with a flow rate of 1mL/min.Detection was done at a wavelength of 339 nm. Õâ¸ö¸ßѹҺÌåÉ«²ã·¨ÏµÍ³ÊÇÓÃ1mL/minµÄÁ÷ËÙÔڵȶȷ´Ïà״̬µÄÌõ¼þÏÂÔËÐУ¬²¢ÔÚ339nmµÄ²¨³¤Ï½øÐмì²â¡£ Minocycline was eluted at 1.5 min,and rifampin was detected at 13 min. ÆäÖÐÃÀÂúÃ¹ËØÏ´ÍÑʱ¼äΪ1.5·ÖÖÓ£¬Àû¸£Æ½¼ì²âʱ¼äΪ13·ÖÖÓ¡£ In pilot trials,known amounts of antibiotics were added to 1-cm segments of uncoated catheters and extracted as outlined above. ÔÚÊÔµãÊÔÑéÖУ¬½«ÒÑÖªÁ¿µÃ¿¹ÉúËØ¼ÓÈ뵽Ϳ²ãµ¼¹ÜµÄ1ÀåÃ×´¦²¢ÈçÉÏÎÄËùÊöµÄ·½Ê½ÌáÈ¡³ö¡£ More than 90% of both antibiotics were recovered. After construction of standard curves,antibiotic cintrols were measured with a consistent accuracy of >85%. ÆäÖг¬¹ý90£¥µÄ¿¹ÉúËØ¶¼Äܹ»±»»ØÊÕ¡£ÔÚÐγɱê×¼ÇúÏߺ󣬲ⶨ¿¹ÉúËØµÄµ÷¿ØÄÜÁ¦ºÍÒÑÖªµÄ´ïµ½ÁË85%ÒÔÉϵÄÒ»ÖÂÐÔ¡£ àÅ£¬ÎÒ·Ö¿ª¸øÄã½âÊÍÁËһϡ£ÆäÖÐÊÇÓм¸¸öרҵ´ÊµÄƴд²»ÊÇÌ«¶Ô£¬ÎÒ¸ø¸ÄÁ˹ýÀ´£¬Ä㿴һϣ¬¶ÔÒ»¶ÔÊDz»ÊÇÄãËùÐèÒªµÄ¡£ |
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