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Suitable for retention of neutral and cationic corrpcunds
• Strong hydrogen b ending IS also effective forpolar cations
• Exhibits LeWIS base properties, rrore retentive towards
electron-donors corrp omds
• The surface has a slightly amcmc nature thrcogh pretreatment
with acidic solutions
Basic pH:
-10.0
(Brockman Act I)
Average Partical Size
Chrompure Alumina-B
125llill
Silica Base
irregular shaped •
______--l
Chrompure Alumina-N
Neutral pH: -7.5
(Brockman Act. I)
Average Partical Size
125llill
Silica Base
irregular shaped
.....
_--_
...
• Extremely polar sorbent,
similar
to silica
• Mer-e stable under high pH conditions than unbonded silica
• An
electrically neutral surface retentive
to-
electron-nch
corrp cunds like arcmatic species and aliphatic ammes, and
corrp cunds with electronegative grcup like oxygen,
phosphcrus and sulfur atcms
• Extrat both nonpolar and polar compounds from aqueous and
nonaqueous matrics respectively
Chrompure Carbon
GCB
Sorbent:
laminated structure
graphitized carom
Average Partical Size
120-400llill
• Higher and more stable recovery rates m extracting polar
substance, like organolchlcrine , crganophosphcrus and
nitrogen pesticides
• Excellent perfcrmance m
ogeruc
extraction and purification
• Extremly rapid extract proccessmg due to the few-porosity
5
Organic Copolymer Base
Chrompure PL
S
~
Chrompure PCX
- S03H
Chrompure PAX
I.
-N~
1
particle size:
au.i oopm
pore size:
70-90 A
area:
600-800m2
particle size:
au.i oopm
pore size:
70-90 A
area:
600-800m2
particle size:
ao-t oopm
pore size:
70-90 A
area:
600-8 iXlm2
• Copolymer of polystyrene! divinylbenzene, contained both hydrophilic
and hydrophcoic radicals
• Good retenti on on polar and n co-polar molecule hydrophilelipophile
balance
• PLS has higher stability and widder pH range P opular ultilised m food
• Sulfcnic acid group bonding polystyrene!divmylbenzene copolymer IS
mixed strong cation exchange sorbent. Both cation exchange and reverse
phase retention node, suitable for carboxylic acid ccmpounds pKa
between
2-8,
mainly amcruc corrp ccnds
• Quatemary ammoruum group bonded copolymer IS mixed
aruon
exchange
and reverse phase so-bent
• Excellent extraction to purified acid, carboxy acid compounds, pKa
between
2-8
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