The Care of Reversed-Phase Columns
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Date : 2015-07-28 11:27 | Hit : 1,228
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< The Care of Reversed-Phase Columns >
¿ª»ó HPLC Ä÷³Àº ÀûÀýÈ÷ »ç¿ëÇϱ⸸ ÇÑ´Ù¸é, samle preparationÀ̳ª, elution »óÅ¿¡ µû¶ó ÃÖ´ë õ¹ø ÀÌ»óÀÇ ½Ã·áÁÖÀÔÀÌ °¡´ÉÇÕ´Ï´Ù. ´ÙÀ½Àº Vydac RP-HPLC Ä÷³¿¡ °üÇÑ ³»¿ëÀÌÁö¸¸, ´Ù¸¥ ´ëºÎºÐÀÇ RP- HPLC Ä÷³¿¡ Àû¿ë½ÃÄѵµ ÁÁÀ» »çÇ×µéÀÔ´Ï´Ù.
* Column Protection *
Ä÷³ÀÇ ¼ö¸íÀº »ç¿ë Á¶°Ç¿¡ µû¶ó Â÷ÀÌ°¡ ÀÖÀ¸¹Ç·Î, ¿ë¸Å¿Í »ùÇÃÀÇ filtering°ú eluent filter¿Í guard columnÀ» »ç¿ëÇÏ¿© ¿¬Àå½Ãų ¼ö ÀÖ½À´Ï´Ù. solvent pump, mixing chamber·ÎºÎÅÍÀÇ ÀÜÇظ¦ Æ÷ȹÇϱâ À§ÇÏ¿©, Solvent delivery system°ú injector »çÀÌ¿¡ eluent filter¸¦ »ç¿ëÇÒ °ÍÀ» ±ÇÀåÇÕ´Ï´Ù. ¶ÇÇÑ ¸¸ÀÏ »ùÇÿ¡ ¿ëÇصÇÁö ¾Ê´Â ¼ººÐÀÌ µé¾îÀְųª, material¿¡ ÈíÂøµÇ´Â compound¸¦ Æ÷ÇÔÇÑ´Ù¸é, injector¿Í Ä÷³ »çÀÌ¿¡ guard columnÀ» »ç¿ëÇÒ °ÍÀ» ±ÇÀåÇÕ´Ï´Ù.
* Column Conditioning *
¿ª»óÇ¥¸éÀÇ Æ¯¼º»ó, Ä÷³ÀÇ ºÐ¸®´ÉÀ̳ª ¼ö¸íÀº óÀ½ ¸î¹øÀÇ protein injectionµ¿¾È Á¶±Ý º¯ÇÒ ¼ö°¡ ÀÖ½À´Ï´Ù. Ä÷³ÀÌ Æ¯¼ºÀÌ ÀâÈú¶§±îÁö ¹Ýº¹ÀûÀ¸·Î proteinÀ» ÁÖÀÔÇϰųª, ȤÀº ribonuclease¿Í °°Àº ´Ü¹éÁúÀ» 100ug ÁÖÀÔÇÏ°í, Acetonitrile/0.1% TFA gradient·Î Èê·ÁÁÜÀ¸·Î½á Ä÷³ÀÇ »óŸ¦ Á¶ÀýÇÒ ¼ö ÀÖ½À´Ï´Ù.
* Column Storage *
RP-HPLC Ä÷³Àº À¯±â¿ë¸Å³ª water¿¡ º¸°üÇÒ ¼ö ÀÖ½À´Ï´Ù. ¿À·§µ¿¾È º¸°üÇϱâ À§Çؼ´Â ion pairing agent³ª buffer¸¦ Ä÷³¿¡¼ ¾Ä¾î³»¾ßÇϸç, organic content°¡ Àû¾îµµ 50% µÇ¾î¾ßÇÕ´Ï´Ù.
* Chemical Stability *
RP-HPLC Ä÷³Àº ÀϹÝÀûÀÎ À¯±â¿ë¸ÅÀÎ Acetonitrile, Ethanol, Isopropanol, Dichloromethane µî¿¡¼ ¾ÈÁ¤ÇÕ´Ï´Ù. solvent¸¦ ±³Ã¼ÇÒ ¶§, ¼¯Àϼö ÀÖ´Â solvent¸¸À» Â÷·Ê·Î »ç¿ëÇÏ´Â °ÍÀÌ Áß¿äÇÕ´Ï´Ù. Silica-based RP-HPLC columnÀº pH 6.5-7¿¡¼ ¾ÈÁ¤Çϸç, SDS(Sodium Dodecyl Sulfate)¿Í °°Àº ÀϹÝÀûÀÎ protein detergent¿¡µµ Çظ¦ÀÔÁö ¾Ê½À´Ï´Ù.
* Pressure and Temperature Limits *
RP-HPLC columnÀº ÀϹÝÀûÀ¸·Î 60¡É¿Í 5000psi(335bar) back-pressure¿¡¼ ¾ÈÁ¤ÇÕ´Ï´Ù. RP-HPLC columnÀÇ ÀüÇüÀûÀÎ back pressure´Â ´ÙÀ½°ú °°½À´Ï´Ù.
---------------------------------------------------------------- Column size(mm) Flow Rate(mL/min) Typical Back-pressure (with 50:50 ACN:Water) ---------------------------------------------------------------- 2.1 x 250 0.20 1000-1800 psi 4.6 x 250 1.0 1000-1800 psi 4.6 x 150 1.0 600-1200 psi 10 x 250 5.0 1000-1800 psi 4.6 x 250 1.0 500-1000 psi 10 x 250 5.0 500-1000 psi 22 x 250 25.0 500-1000 psi ----------------------------------------------------------------
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