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¿µÁøÄÚÆÛ·¹ÀÌ¼Ç Á¾ÇÕÄ«´Ù·Î±× |
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Introduction
Domperidone Àº ÁÖ·Î Ç÷¾×-³ú À庮 ¿ÜºÎÀÇ ÈÇмö¿ëü À¯¹ß ¿µ¿ª¿¡ ÀÛ¿ëÇÏ´Â Á¦ 2¼¼´ë À§Àå¿îµ¿ÃËÁøÁ¦ÀÇ ´ëÇ¥ÀûÀÎ ¾à¹°·Î, ÇÕ¼º Benzimidazole À¯µµÃ¼ÀÔ´Ï´Ù.
ÀÌ´Â µµÆĹΠ¼ö¿ëü Â÷´ÜÁ¦·Î, ¸»ÃÊ µµÆĹΠ¼ö¿ëü¸¦ Â÷´ÜÇÔÀ¸·Î½á ±¸Å並 ¾ïÁ¦ÇÏ°í À§Àå ¿îµ¿¼ºÀ» Çâ»ó½ÃÅ°¸ç ÇϺΠ½Äµµ °ý¾à±Ù ¾Ð·ÂÀ» Áõ°¡½Ãŵ´Ï´Ù.
Domperidone Àº ÁÖ·Î º¹ºÎ Æظ¸°¨, ½Äµµ ¿ª·ù, ±×¸®°í ÈÇпä¹ýÀ¸·Î ÀÎÇÑ ±¸Åä Ä¡·á¿¡ ³Î¸® »ç¿ëµË´Ï´Ù.
Domperidone ÀÔÀÚÀÇ ¿ëÇصµ´Â ü³» Èí¼ö¿¡ Å« ¿µÇâÀ» ¹ÌÄ¡±â ¶§¹®¿¡ ÀÔÀÚ Å©±â°¡ Á¦Ç° Ç°Áú¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» °ËÅäÇÏ´Â °ÍÀÌ ÇÊ¿äÇÕ´Ï´Ù.
¹èÄ¡ °£ ÀÔÀÚ Å©±â ºÐÆ÷ÀÇ Â÷ÀÌ´Â ¿ëÇصµ ¹× ü³» Èí¼ö¿¡ ºÒÀÏÄ¡¸¦ ÃÊ·¡ÇÒ ¼ö ÀÖÀ¸¸ç, ÀÌ´Â ¾à¹°ÀÇ È¿´É°ú ¾ÈÀü¼º¿¡ Á÷Á¢ÀûÀÎ ¿µÇâÀ» ¹ÌÄ¥ ¼ö ÀÖ½À´Ï´Ù.
µû¶ó¼ ÀÔÀÚ Å©±â ºÐÆ÷°¡ Á¦Ç° Ç°Áú¿¡ ¹ÌÄ¡´Â È¿°ú¿¡ ´ëÇÑ ¿¬±¸°¡ ÇʼöÀûÀÔ´Ï´Ù.
USP (¹Ì±¹ ¾àÀü) ´Â ·¹ÀÌÀú ȸÀý¹ýÀ» ÀÌ¿ëÇÑ ¿ø·áÀǾàÇ° (API) ÀÔÀÚ Å©±â ÃøÁ¤¿¡ ´ëÇÑ ¸íÈ®ÇÑ ±ÔÁ¤À» °¡Áö°í ÀÖÀ¸¸ç, ÃøÁ¤ ÀåºñÀÇ ±¸Á¶¿Í ¿ø¸®, °Ç½Ä ¹× ½À½Ä ÃøÁ¤ ¹æ¹ý¿¡ ´ëÇÑ
±¸Ã¼ÀûÀÎ ÁöħÀ» Á¦°øÇÏ°í ÀÖ½À´Ï´Ù. ±×·¯³ª ƯÁ¤ ¾à¹°¿¡ ´ëÇؼ´Â ½À½Ä ¶Ç´Â °Ç½Ä ºÐ»ê ¹æ¹ýÀ» Æò°¡ÇÏ°í ¼±ÅÃÇÏ´Â ¹æ¹ý¿¡ ´ëÇÑ ÁöħÀÌ Á¦°øµÇÁö ¾Ê½À´Ï´Ù.
º» ³í¹®Àº USP (¹Ì±¹ ¾àÀü) ¹× ISO 13320 Ç¥ÁØ¿¡ µû¶ó Domperidone ¿ø·áÀǾàÇ° (API) ÀÇ ÀÔÀÚ Å©±â ºÐÆ÷¸¦ ÃøÁ¤ÇÒ ¶§ ºÐ»ê ¹æ¹ýÀ» ¼±ÅÃÇÏ´Â ¹æ¹ý¿¡ ´ëÇØ Ã¼°èÀûÀÎ ¿¬±¸¸¦ ¼öÇàÇß½À´Ï´Ù.
1. Experiment
1.1 Instruments
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Bettersizer 2600 laser particle size analyzer from Bettersize Instrument Ltd. |
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MS303S electronic scale from Mettler Toledo. |
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SC ultrasonic cleaner from Shanghai Shengyan Ultrasonic Instrument Co.,Ltd. |
1.2 Sample and Reagents
Two sets of Domperidone API sample :
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No.1 : non-micronized sample (batch No.0068116-17); |
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No.2 : micronized sample; |
Tween 80 for analytical reagent; Purified water.
2. Particle size distribution measurement and method evaluation
2.1 Dry dispersion method
2.1.1 Study on the methodology of dry dispersion method
°Ç½Ä ºÐ»êÀº ºÐ¸» ÀÔÀÚ¸¦ ¾ÐÃà °ø±â·Î ¿î¹ÝÇÏ°í, ÀÔÀÚ °£ Ãæµ¹, ÀÔÀÚ¿Í ÆÄÀÌÇÁ °£ Ãæµ¹, ±×¸®°í ±â·ù Àü´ÜÀ» ÅëÇØ ºÐ»ê½ÃÅ°´Â ¹æ¹ýÀÔ´Ï´Ù.
API ºÐ¸»Àº ÀÛÀº À¯±â ºÐÀÚ ÀÔÀÚ·Î ±¸¼ºµÇ¾î ÀÖÀ¸¸ç, ÀÌ´Â Àü´Ü ÀÀ·Â°ú Ãæµ¹·Î ÀÎÇØ ÆÄ¼ÕµÉ ¼ö ÀÖ½À´Ï´Ù.
¿ø·¡ ÀÔÀÚ°¡ ÆļյÇÁö ¾ÊÀº »óÅ¿¡¼ Å« ÀÀÁýü¸¦ ºÐ»ê½ÃÅ°±â À§ÇØ, USP (¹Ì±¹ ¾àÀü) ¿¡¼´Â ´Ù¾çÇÑ ºÐ»ê °µµ°¡ ½ÃÇè °á°ú¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¶»çÇÒ °ÍÀ» ¿ä±¸ÇÏ°í ÀÖ½À´Ï´Ù. (USP 429)
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°Ç½Ä ºÐ»ê ½ÇÇè¿¡¼´Â ºÐ»ê ¾Ð·ÂÀÌ ÀÔÀÚ Å©±â ÃøÁ¤ °á°ú¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¶»çÇß½À´Ï´Ù.
ºÐ»ê ¾Ð·ÂÀº 0.05 MPa ¿¡¼ 0.4 MPa ±îÁö ¹üÀ§·Î ¼³Á¤ÇÏ¿´À¸¸ç, 0.05 MPa ¸¶´Ù µ¥ÀÌÅ͸¦ ÃøÁ¤Çß½À´Ï´Ù.
- °¡·ÎÃà : ºÐ»ê ¾Ð·Â
- ¼¼·ÎÃà: ÀÔÀÚ Å©±â
- ÆĶõ °î¼±: D10
- ÁÖȲ °î¼±: D50
- ȸ»ö °î¼±: D90
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Figure 1. Particle size pressure titration data of non- micronized sample
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Figure 2. Particle size pressure titration data of micronized sample
ÀÌ»óÀûÀÎ ¾Ð·Â ÀûÁ¤ °î¼±¿¡¼´Â ºÐ»ê ¾Ð·ÂÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ÀÔÀÚ Å©±â°¡ Á¡Â÷ °¨¼ÒÇϸç, °î¼±Àº Á¡Â÷ ¾ÈÁ¤µÈ ±¸°£¿¡ µµ´ÞÇÕ´Ï´Ù.
¾Ð·ÂÀ» ´õ ³ôÀ̸é Å« ÀÀÁýü°¡ ´ÜÀÏ ÀÔÀÚ·Î Á¡ÁøÀûÀ¸·Î ºÐ»êµÇ¸é¼ °î¼±ÀÌ ´õ ÇÏÇâÇÏ°Ô µË´Ï´Ù.
±×·¯³ª ¾Ð·ÂÀ» Áö³ªÄ¡°Ô ³ôÀÌ¸é ¾à¹° ÀÔÀÚ°¡ ÆÄ¼ÕµÉ ¼ö ÀÖ½À´Ï´Ù.
¹®Á¦´Â ÀÀÁýü ºÐ»ê°ú ´ÜÀÏ ÀÔÀÚ ÆÄ¼Õ »çÀÌ¿¡ ¸íÈ®ÇÑ °æ°è°¡ ¾ø±â ¶§¹®¿¡ Ãß°¡ ½ÇÇèÀÌ ÇÊ¿äÇÏ´Ù´Â Á¡ÀÔ´Ï´Ù.
Figure 2¿¡¼´Â micronized sample ÀÇ °æ¿ì 0.2 MPa ¿¡¼ 0.35 MPa »çÀÌ¿¡ ¸íÈ®ÇÑ stable platform (¾ÈÁ¤ Ç÷§Æû) ÀÌ ³ªÅ¸³µ½À´Ï´Ù.
¹Ý¸é, non-micronized sample ÀÇ ¾Ð·ÂÀ» Áõ°¡½Ãų ¶§´Â stable platform ÀÌ ³ªÅ¸³ªÁö ¾Ê¾ÒÀ¸¸ç, ÀÔÀÚ Å©±â°¡ Áö¼ÓÀûÀ¸·Î °¨¼ÒÇß½À´Ï´Ù.
ÀÌ´Â ÀϹÝÀûÀ¸·Î ÀÔÀÚ ÆļÕÀÇ ½ÅÈ£·Î Çؼ®µË´Ï´Ù.
Ãß°¡ Áø´ÜÀ» À§ÇØ non-micronized sample ÀÇ À̹ÌÁö¸¦ Æ÷ÂøÇÑ °á°ú (Figure 3), ÇØ´ç »ùÇÃÀº ¹ÝÅõ¸íÇÑ ºÒ±ÔÄ¢ °áÁ¤ ÀÔÀÚ ÇüŸ¦ º¸¿´½À´Ï´Ù.
ÀÌ·¯ÇÑ »óÅ·ΠÆÇ´ÜÇÒ ¶§, ÇØ´ç »ùÇÃÀº ½±°Ô ÆÄ¼ÕµÉ °¡´É¼ºÀÌ ÀÖ½À´Ï´Ù. °Ç½Ä ºÐ»ê ¾Ð·ÂÀ» ³ôÀϼö·Ï ÀÔÀÚ ÆļÕÀÇ À§Çèµµ Áõ°¡ÇÒ °ÍÀÔ´Ï´Ù.
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Figure 3. Image of non-micronized sample
ÀûÀýÇÑ °Ç½Ä ºÐ»ê ¾Ð·ÂÀ» ´õ ÀÚ¼¼È÷ °áÁ¤Çϱâ À§ÇØ, non-micronized sample ÀÇ ÀÔÀÚ Å©±â ºÐÆ÷¸¦ ´Ù¾çÇÑ ¾Ð·Â ÇÏ¿¡¼ Å×½ºÆ®Çß½À´Ï´Ù (Figure 4).
°á°ú¿¡ µû¸£¸é, ºÐ»ê ¾Ð·ÂÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ÃÖ´ë ÀÔÀÚ Å©±â°¡ 150 - 100 ¥ìm ¿¡¼ 30 - 20 ¥ìm ·Î °¨¼ÒÇß½À´Ï´Ù.
¶ÇÇÑ À̹ÌÁö ºÐ¼®À» ÅëÇØ ¾à 100 ¥ìm Å©±âÀÇ ¸î¸î °ÅÄ£ ÀÔÀÚ°¡ Á¸ÀçÇÔÀÌ È®ÀεǾú½À´Ï´Ù.
´õ ³ª¾Æ°¡, ÀÌ·¯ÇÑ °ÅÄ£ ÀÔÀÚµéÀº ÀÀÁýµÈ ÀÔÀÚ°¡ ¾Æ´Ï¶ó ´ÜÀÏ ÀÔÀÚ·Î ½Äº°µÉ ¼ö ÀÖ¾ú½À´Ï´Ù (Figure 5-6).
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Figure 4. Particle size distribution of non-micronized sample under different pressures: red, green, navy, and cyan curve respectively represent 0.1, 0.2, 0.3, and 0.4 Mpa
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Figure 5. Image of non-micronized particles
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Figure 6. Image of non-micronized particles
ÃÖ´ë ÀÔÀÚ Å©±â°¡ 30 - 20 ¥ìm ¶ó´Â °ÍÀº »ç½ÇÀÌ ¾Æ´Ï¾ú½À´Ï´Ù.
µû¶ó¼ ºÐ»ê ¾Ð·ÂÀÌ 0.3 MPa ¸¦ ÃÊ°úÇßÀ» ¶§ ÀÔÀÚ°¡ ÆļյǾú´Ù°í °á·ÐÀ» ³»¸± ¼ö ÀÖ½À´Ï´Ù. ¾Ð·Â Àû
¾Ð·Â ÀûÁ¤ °î¼± (Figure 2) °ú »ùÇà ÀÚüÀÇ Ãë¾à¼ºÀ» °í·ÁÇÏ¿©, Domperidone ¿ø·áÀǾàÇ° API) ÀÇ ÀÔÀÚ Å©±â ºÐÆ÷¸¦ ÃøÁ¤ÇÏ´Â µ¥ 0.2 MPa ÀÇ ¾Ð·ÂÀ» ¼±ÅÃÇß½À´Ï´Ù.
2.1.2 Research on the precision of dry dispersion method
À§ ½ÇÇèÀ» ¹ÙÅÁÀ¸·Î Domperidone ¿ø·áÀǾàÇ° (API) Àº 0.2 MPa ÀÇ ºÐ»ê ¾Ð·Â¿¡¼ ÃøÁ¤µÇ¾ú½À´Ï´Ù. ±×¸² 7 °ú 8 ¿¡´Â ºñ¹ÌºÐÈ ¹× ¹ÌºÐÈ »ùÇÃÀÇ ÀÔÀÚ Å©±â ºÐÆ÷ °î¼±°ú ¹Ýº¹ ÃøÁ¤ µ¥ÀÌÅÍ°¡ ³ªÅ¸³ª ÀÖ½À´Ï´Ù.
µÎ »ùÇÃÀÇ ¹Ýº¹ ÃøÁ¤ °á°ú´Â USP (¹Ì±¹ ¾àÀü) ÀÇ ¿ä±¸ »çÇ×À» Å©°Ô ÃÊ°úÇß½À´Ï´Ù. D50 ÀÇ ÀçÇö¼ºÀº 2.1% ¹Ì¸¸À̾ú°í, D10 °ú D90 ÀÇ ÀçÇö¼ºÀº 3.5% ¹Ì¸¸À̾ú½À´Ï´Ù.
ÀÌ´Â °Ç½Ä ºÐ»ê ¹æ¹ýÀÌ Domperidone API ÀÔÀÚ Å©±â ºÐÆ÷¸¦ ÃøÁ¤ÇÏ´Â µ¥ ½Å·ÚÇÒ ¼ö ÀÖÀ½À» ÀÔÁõÇÏ´Â °ÍÀÔ´Ï´Ù.
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Figure 7. Particle size distribution and repeatability of non-micronized particles (dry dispersion)
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Figure 8. Particle size distribution and repeatability of micronized particles (dry dispersion)
2.2 Wet dispersion method
2.2.1 Study on the methodology of wet dispersion method
Domperidone ¿ø·áÀǾàÇ° (API) Àº ¹°¿¡ ºÒ¿ë¼ºÀÔ´Ï´Ù. °è¸éÈ°¼ºÁ¦·Î ½ÀÀ± ó¸®ÇÑ ÈÄ, »ùÇÃÀ» ±³¹Ý ¹× ÃÊÀ½ÆÄ ºÐ»êÀ» ÅëÇØ ¹°¿¡ ºÐ»ê½ÃÄ×½À´Ï´Ù.
»ùÇÃÀÇ Ãë¾à¼º ¶§¹®¿¡ ºÐ»ê °µµ´Â ³·°Ô À¯ÁöÇØ¾ß ÇÕ´Ï´Ù. µ¿½Ã¿¡, ºÐ»ê °µµ°¡ »ùÇà ÀÔÀÚ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¶»çÇϱâ À§ÇØ µÎ °¡Áö ºÐ»ê ¹æ¹ý, Áï ±³¹Ý°ú ÃÊÀ½ÆÄ ºÐ»êÀÌ °¢°¢ Àû¿ëµÇ¾ú½À´Ï´Ù (Figure 9 and 10).
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Figure 9. Test sample particle size distribution under agitation only
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Figure 10. Test sample particle size distribution after stir dispersion only
Figure 9 ¿Í 10 ¿¡¼ ¾Ë ¼ö ÀÖµíÀÌ, »ùÇÃÀ» ´Ü¼øÈ÷ ±³¹ÝÇßÀ» ¶§ °á°ú°¡ ¾ÈÁ¤ÀûÀÌÁö ¾Ê¾Ò½À´Ï´Ù. ¶ÇÇÑ ½À½Ä ºÐ»êÀÇ Æ¯¼ºÀ» °í·ÁÇÒ ¶§, ¾à¹° ÀÔÀÚ°¡ ¿©ÀüÈ÷ ¼·Î ´Þ¶óºÙÀ» ¼ö ÀÖ¾ú½À´Ï´Ù.
±×·¯³ª ³·Àº °µµÀÇ ÃÊÀ½ÆÄ ºÐ»êÀ» Àû¿ëÇÑ ÈÄ ¾ÈÁ¤¼ºÀÌ Å©°Ô Çâ»óµÇ¾ú½À´Ï´Ù.
µ¿½Ã¿¡ ÃÊÀ½ÆÄ´Â ÀÔÀÚ Å©±â ºÐÆ÷¿¡ °ÅÀÇ ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê¾ÒÀ¸¸ç, ÁÖ·Î Å« ÀÔÀÚÀÇ ÈÄÇà Çö»ó¿¡ ¿µÇâÀ» ¹ÌÃƽÀ´Ï´Ù.
³·Àº °µµÀÇ ÃÊÀ½ÆÄ ºÐ»ê¿¡¼ ÃøÁ¤ °á°úÀÇ ÀçÇö¼ºÀÌ Å©°Ô °³¼±µÇ¾ú±â ¶§¹®¿¡ ÀÌÈÄÀÇ ½À½Ä ºÐ»êÀº Àú°µµ ÃÊÀ½ÆÄ ¹æ¹ýÀ» äÅÃÇß½À´Ï´Ù.
2.2.2 Research on the precision of wet dispersion method
À§ Á¶°ÇÀ» À¯ÁöÇÑ »óÅ¿¡¼, Àú°µµ ÃÊÀ½ÆÄ·Î ºÐ»êÇÑ »ùÇÃÀÇ ÀÔÀÚ Å©±â ºÐÆ÷ µ¥ÀÌÅÍÀÇ Á¤¹Ðµµ¸¦ Á¶»çÇß½À´Ï´Ù.
Figure 11 °ú 12 ¿¡´Â ºñ¹ÌºÐÈ ¹× ¹ÌºÐÈ »ùÇÃÀÇ ½À½Ä ºÐ»ê¿¡ µû¸¥ ÀÔÀÚ Å©±â ºÐÆ÷¿Í ¹Ýº¹ ÃøÁ¤ µ¥ÀÌÅÍ°¡ ³ªÅ¸³ª ÀÖ½À´Ï´Ù.
°Ç½Ä ºÐ»ê°ú ºñ±³ÇßÀ» ¶§, ÀçÇö¼ºÀÌ Å©°Ô Çâ»óµÇ¾ú½À´Ï´Ù. D50 °ú D90 ÀÇ »ó´ë ÆíÂ÷´Â 0.7% ÀÌÇÏ¿´°í, D10 ÀÇ »ó´ë ÆíÂ÷´Â 2.6% ÀÌÇÏ·Î ³ªÅ¸³µ½À´Ï´Ù.
ÀÌ´Â Domperidone API ÀÔÀÚ Å©±â ºÐÆ÷¸¦ ÃøÁ¤ÇÒ ¶§ ½À½Ä ºÐ»êÀÌ °Ç½Ä ºÐ»êº¸´Ù ´õ ½Å·ÚÇÒ ¼ö ÀÖÀ½À» ÀÔÁõÇÕ´Ï´Ù.
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Figure 11. Particle size distribution and repeatability of non-micronized sample (wet dispersion)
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Figure 12. Particle size distribution and repeatability of micronized sample (wet dispersion)
2.3 Compare and evaluate dry and wet dispersion methods
¿ì¼±, ½ÃÇè Á¤¹Ðµµ Ãø¸é¿¡¼ ½À½Ä ºÐ»êÀÌ °Ç½Ä ºÐ»êº¸´Ù È®¿¬È÷ ¿ì¼öÇß½À´Ï´Ù. ÀÌ´Â °Ç½Ä ºÐ»ê¿¡¼´Â ÀÔÀÚ°¡ ½ÃÇè ±¸¿ªÀ» ÇÑ ¹ø¸¸ Åë°úÇÏ´Â ¹Ý¸é,
½À½Ä ºÐ»ê¿¡¼´Â ¿©·¯ ¹ø Åë°úÇÏ¿© »ùÇøµ ºóµµ°¡ ´õ ³ô¾ÆÁö±â ¶§¹®ÀÔ´Ï´Ù.
µÑ°, µ¥ÀÌÅÍÀÇ »ó´ëÀû ÇÕ¸®¼º °üÁ¡¿¡¼, ±×¸² Figure 13 °ú 14 ´Â non-micronized ¹× micronized sample ÀÇ °Ç½Ä ¹× ½À½Ä ºÐ»ê ¹æ¹ý¿¡ µû¸¥ ÀÔÀÚ Å©±â ºÐÆ÷ µ¥ÀÌÅ͸¦ º¸¿©ÁÝ´Ï´Ù.
½À½Ä ºÐ»ê ¹æ¹ý¿¡¼´Â micronization ÀÌÈÄ ÀÔÀÚ Å©±â ºÐÆ÷ÀÇ ÇÇÅ©°¡ ´õ ÀÛÀº ÀÔÀÚ ÂÊÀ¸·Î À̵¿ÇßÀ¸¸ç, D10, D50, D90 ¸ðµÎ ´Ù¾çÇÑ Á¤µµ·Î °¨¼ÒÇß½À´Ï´Ù.
±×·¯³ª °Ç½Ä ºÐ»ê ¹æ¹ý¿¡¼´Â ¹ÌºÐÈ ÀüÈÄ·Î Å« ÀÔÀÚµéÀÌ Å©°Ô º¯ÈÇÑ ¹Ý¸é, ¹Ì¼¼ ÀÔÀÚµéÀº °ÅÀÇ º¯ÈÇÏÁö ¾Ê¾Ò½À´Ï´Ù.
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Figure 13. Compare particle size distribution results before and after micronization (wet dispersion)
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Figure 14. Compare particle size distribution results before and after micronization (dry dispersion)
3. Conclusion
Á¾ÇÕÀûÀ¸·Î º¼ ¶§, Domperidone API ÀÔÀÚ Å©±â ºÐÆ÷ ÃøÁ¤¿¡¼´Â °Ç½Ä ºÐ»ê°ú ½À½Ä ºÐ»ê ¹æ¹ý ¸ðµÎ ³ôÀº Á¤¹ÐµµÀÇ °á°ú¸¦ Á¦°øÇÒ ¼ö ÀÖ½À´Ï´Ù.
±×·¯³ª Domperidone API ´Â Ãë¾àÇϹǷÎ, »ùÇà ºÐ»ê¿¡ ÃæºÐÇÑ µ¥ÀÌÅÍ Áö¿øÀÌ ÇÊ¿äÇϸç, ƯÈ÷ °Ç½Ä ºÐ»ê ¹æ¹ý¿¡¼´Â ´õ¿í ±×·¸½À´Ï´Ù.
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Reference
[1] Aifen Liu. Research on gastrointestinal motility pharmaceutical [J]. China Practical Medicine, 2008, 34(3): 200-201.
[2] CHP second version appendix in 2010 [S]. Beijing: China medicine scientific press 2010:405-406.
[3] Zhukang Chen, Guiliang Chen, Huiyi Li. Research on pharmaceutical and its preparation particle size distribution analysis. [J]. CHP standard, 2012, 13(6): 405.
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