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- Reference: EURACHEM GUIDELINES
- Tested with VELP Scientifica OXITEST Oxidation Stability Reactor   (Code F30900248) |
OXITEST ¸¦ ÀÌ¿ëÇÏ¿© ¼·Î ´Ù¸¥ 3°¡Áö Á¶¼ºÀÇ cold wax strip ÀÇ »êȾÈÁ¤¼ºÀ» È®ÀÎÇÏ¿´´Ù.
ºÐ¼® °á°ú formula 3 ¿¡ ºñÇØ formula 1 ÀÇ »êÈ ¾ÈÁ¤¼ºÀÌ 73% ´õ °³¼±µÇ¾ú´Ù. |
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Introduction
ÈÀåÇ° »ê¾÷¿¡¼ Á¦¸ð¿ë strip Àº ¿øÄ¡ ¾Ê´Â ºÎÀ§ÀÇ Ã¼¸ð Á¦°Å¿¡ »ç¿ëµÇ¸ç, ƯÈ÷ ÇǺο¡ Á¢ÂøÇÑ µÚ ¶¼¾î³¾ ¶§ ¸¶Âû¿¡ ÀÇÇÑ ÇǺΠ¼Õ»óÀ» ÁÙÀ̱â À§ÇØ cold wax ¸¦ »ç¿ëÇÑ´Ù.
±×·¯³ª cold wax ´Â Áö¹æÀÇ ÇÑ Á¾·ù·Î½á ÁÖº¯ ¿Âµµ ¹× »ê¼Ò¿¡ ÀÇÇØ »êÈµÇ¾î ¹°¼ºÀÌ º¯ÈÇÏ°í Ȳº¯ÀÌ ¹ß»ýÇÏ¿© Ç°ÁúÀÌ ÀúÇϵȴÙ.
ÀÌ·¯ÇÑ »êÈ¿¡ ´ëÇÑ ÀúÇ×¼ºÀ» »êÈ ¾ÈÁ¤¼º (oxidation stability) À̶ó°í ÇÏ°í, °íÇ°ÁúÀÇ Á¦¸ð¿ë strip À» Á¦Á¶Çϱâ À§ÇØ »êÈ ¾ÈÁ¤¼ºÀÇ È®ÀÎÀÌ ¸Å¿ì Áß¿äÇÏ´Ù.
OXITEST ´Â ÁöÁúÀÌ »êÈµÈ °á°ú·Î »ê¼Ò ¾Ð·ÂÀÌ °¨¼ÒÇÏ¸é ±× ¾Ð·ÂÂ÷¸¦ °¨ÁöÇÏ¿© »êȹÝÀÀÀÌ ³ªÅ¸³ ½ÃÁ¡ (IP, Induction Period) À» ÃøÁ¤ÇÑ´Ù.
ÈÀåÇ°ÀÇ IP °ªÀ» ÃøÁ¤Çϱâ À§Çؼ´Â ÀϹÝÀûÀ¸·Î 6°³¿ù¿¡¼ ¼ö³âÀÌ °É¸®Áö¸¸, OXITEST ¸¦ »ç¿ëÇÏ¸é °í¿Â°ú °í¾ÐÀÇ »ê¼Ò (110 ¡É, 8 bar) 2°¡Áö Á¶°ÇÀ¸·Î
»êÈ ¹ÝÀÀÀ» È¿°úÀûÀ¸·Î °¡¼ÓÈÇÏ¿© ªÀº ½Ã°£ ³»¿¡ IP °ªÀ» È®ÀÎÇÒ ¼ö ÀÖ´Ù.
¶ÇÇÑ, º°µµÀÇ Áö¹æ ÃßÃâ (lipid extraction) °úÁ¤ ¾øÀÌ ½Ã·á¸¦ ±×´ë·Î »ç¿ëÇϹǷΠÁ¦Ç° ³» ¹Ì¼¼ ±¸Á¶ ¹× Á¶¼ºÀ» À¯ÁöÇÑ Ã¤·Î ºÐ¼®ÇÏ¿© ½Å·Ú¼ºÀÌ ³ôÀº °á°ú¸¦ ¾òÀ» ¼ö ÀÖ´Ù.
Methods
»ùÇà : ¼·Î ´Ù¸¥ 3°¡Áö Á¾·ùÀÇ cold wax strips ¸¦ Á¦Ç° ±×´ë·Î ºÐ¼®ÇÏ¿´´Ù
- Cold wax strips formula 1
- Cold wax strips formula 2
- Cold wax strips formula 3
¨ç 2°³ÀÇ titanium ÀçÁú sample holder ¿¡ »ùÇÃÀ» 20 g ¾¿ ³Ö´Â´Ù.
¨è °¢ reaction chamber ¿¡ ¨ç ÀÇ sample holder ¸¦ 1°³¾¿ ³Ö´Â´Ù.
¨é OXISoft ¼ÒÇÁÆ®¿þ¾î¸¦ »ç¿ëÇÏ¿© ´ÙÀ½°ú °°ÀÌ Á¶°ÇÀ» ¼³Á¤ÇÑ´Ù.    
- temperature : 100 ¡É    
- oxygen pressure : 6 bar
¨ê O-ring ¿¡ silicon grease ¸¦ ¹Ù¸£°í, Àß À§Ä¡½ÃŲ´Ù.
¨ë ¼³Á¤ ¿Âµµ¿¡ À̸£¸é, Ä¿¹öÀÇ discharge valve ¸¦ ´Ý°í °í¾ÐÀÇ »ê¼Ò¸¦ õõÈ÷ ÁÖÀÔÇÑ´Ù.
¨ì Á¶°ÇÀÌ ¾ÈÁ¤ÈµÇ¸é Àåºñ°¡ ÀÚµ¿À¸·Î ºÐ¼®À» ½ÃÀÛÇÏ°í, chamber ³»¿¡ ¹ß»ýÇÑ ¾Ð·Â º¯È°¡    
½Ç½Ã°£À¸·Î ±â·ÏµÈ´Ù.
¨í OXISoftTM ¼ÒÇÁÆ®¿þ¾î´Â »ùÇÃÀÇ IP °ªÀ» ÀÚµ¿À¸·Î °è»êÇÑ´Ù.
Results
°¢ »ùÇÃÀ» 2ȸ ¹Ýº¹ ½ÇÇèÇß°í, ±× °á°ú´Â ´ÙÀ½°ú °°ÀÌ IP °ªÀÌ ÀÚµ¿À¸·Î °è»êµÇ¾ú´Ù.
´ÙÀ½Àº À§ data ¸¦ OXISoft ¼ÒÇÁÆ®¿þ¾îÀÇ fomulas comparision ±â´ÉÀ» »ç¿ëÇÏ¿© ºÐ¼®ÇÑ °á°úÀÌ´Ù.
Conclusion
- ÇØ´ç °á°ú¿¡¼ »ùÇ𣠻êÈ ¾ÈÁ¤¼º (IP) ¼øÀ§´Â ´ÙÀ½°ú °°´Ù.    
: Cold wax strip formula 1 > Cold wax strip formula 3 > Cold wax strip formula 2
- Cold wax strip formula 2 ¿¡ ºñÇØ Cold wax strip formula 1 ÀÇ »êÈ ¾ÈÁ¤¼º (IP) ÀÌ 73% ´õ  
°³¼±µÇ¾ú´Ù.
OXITEST ÀåÁ¡
- »ùÇÃÀ» Àüó¸® (lipid extraction) ÇÒ ÇÊ¿ä°¡ ¾ø¾î ¿øÀç·á ³»¿¡¼ ´Ù¸¥ ¼ººÐ°úÀÇ »óÈ£ÀÛ¿ë ¹×   Ç°ÁúÀ» À¯ÁöÇÑ Ã¤ ÃøÁ¤ÇÏ¿© °á°úÀÇ ¿ÀÂ÷°¡ Àû´Ù.
- Titanium ÀçÁúÀÇ sample holder ´Â ¹Ý¿µ±¸ÀûÀ¸·Î »ç¿ëÀÌ °¡´ÉÇÏ´Ù.
- »êÈ ¹ÝÀÀÀ» 2°¡Áö factor (°í¿Â, °í¾Ð»ê¼Ò) ·Î °¡¼ÓÈÇÏ¿© ±âÁ¸ ÃøÁ¤ ¹æ½Ä¿¡ ºñÇØ ºÐ¼® ½Ã°£À»   ȹ±âÀûÀ¸·Î ´ÜÃàÇÏ¿´´Ù.
- ƯÈ÷, Á¦Ç°°£ IP °ªÀ» ºñ±³ÇÏ¿© Ç°Áú°ü¸®´Â ¹°·Ð, °øÁ¤ °³¼±, Á¦Ç° Á¶¼ºÀÇ ÃÖÀûÈ, Á¦Ç° °³¹ß   ¾÷¹«¸¦ ½±°í, Àü¹®ÀûÀ¸·Î ¼öÇàÇÒ ¼ö ÀÖ´Ù.
- OXISoftTM ÀÇ 6°¡Áö ºÐ¼® toolÀ» »ç¿ëÇÏ¿© R&D, Ç°Áú°ü¸®°¡ ¿ëÀÌÇÏ´Ù.  
¨ç Repeatability test  
¨è Freshness test  
¨é Formula comparison  
¨ê Packing comparison  
¨ë IP during ageing  
¨ì Estimated shelf life
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