کارتریج CLEAN-UP Quaternary Amine w Hydroxide

ویژگی های محصول:
  • QAX:Chemical Phase
  • 8.4%:Organic Loading
  • 60Å:Average Pore Size
  • 0.230 meq/g:Anion Exchange
  • 500 m2/g:Surface Area
  • 0.77 cm3/g:Pore Volume

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  • تضمین بهترین قیمت بازار
  • پشتیبانی عالی ۲۴ ساعته، ۷ روز هفته
  • بازگشت وجه در صورت عدم رضایت
  • اصالت کالاها از برترین برندها
  • تحویل سریع در کمترین زمان ممکن

MECHANISM OF ION EXCHANGE BONDING

Compounds are retained on the sorbent through ionic bonds.  Therefore, it is essential that the sorbent and the analyte to be extracted are charged.  Generally, the number of molecules with charged cationic groups increases at pH values below the molecules pKa value.  The number of molecules with charged anionic groups decreases at pH values below the molecule’s pKa value.  To ensure 99% or more ionization, the pH should be at least two pH units below the pKa of the cation and two pH units above the pKa of the anion.  Elution occurs by using a solvent to raise the pH above the pKa of the cationic group or to lower the pH below the pKa of the anion to disrupt retention.  At this point, the sorbent or compound is neutralized.

These sorbents are composed of a silica backbone bonded with carbon chains terminated by a negatively or positively charged functional group.  Ion exchange interactions occur between a sorbent that carries a charge and a compound of opposite charge.

This electrostatic interaction is reversible by neutralizing the sorbent and/or analyte.  Ion exchange bonds can also be disrupted by the introduction of a counter ion to compete with the analyte for binding sites on the sorbent.

ANION EXCHANGE SORBENTS & STRUCTURES

Sorbent                                                                         Structure                                                                               pKa

Aminopropyl (primary amine)                                   -Si-(CH2)3NH3+                                                                             9.8

N-2-Aminoethyl (primary & secondary amine)            -Si-(CH2)3NH2+(CH2)2NH3+                                                          10.1, 10.9

Diethylamino (tertiary amine)                                  -Si-(CH2)3NH+(CH2CH3)2                                                              10.6

Quaternary Amine Chloride                                    -Si-(CH2)3N+(CH3)3 Cl–                                                         Always charged

Quaternary Amine Hydroxide                                 -Si-(CH2)3N+(CH3)3 OH–                                                       Always charged

Quaternary Amine Acetate                                     -Si-(CH2)3N+(CH3)3 CH3COO–                                             Always charged

Quaternary Amine Formate                                    -Si-(CH2)3N+(CH3)3 HCOO–                                                  Always charged

Polyimine                                                            -Si-(CH2)3NH(CH2COOH)(CH2)N(CH2COOH)2

 

UnitsDescriptionPart Number
20Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 5000mg 25mLCHQAX15M25
30Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 1000mg 6mLCHQAX1M6
100Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 100mg 1mLCHQAX111
20Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 2000mg 15mLCHQAX12M15
50Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 200mg 10mLCHQAX12Z
50Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 200mg 3mLCHQAX123
50Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 500mg 10mLCHQAX15Z
50Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 500mg 3mLCHQAX153
50Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 500mg 6mLCHQAX156
100Clean-Up Quaternary Amine w/ Hydroxide Counter Ion 50mg 1mLCHQAX1L1

 

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