aquaMAX
TM
– Ultra 370 Series
- 2 -
1-2. Principals
1-2-1. ULTRA-Pack
The ULTRA-Pack is the heart of the aquaMAX-Ultra water system designed to provide water that is virtually
free of ions, residual chlorine and organic contamination. This special filter pack(Polypropylene shell) contains
specially prepared activated carbon, high mixed bed ion exchange resin and specialized organic scavenging
resin. This combination of high purified filter media makes the aquaMAX-Ultra system suitable for producing
water in the resistivity 18.2M
Ω
·cm for extremely sensitive applications such as HPLC, Cell Culture, Semi-
Conductors, pharmaceutical and other laboratory uses.
The most important property is to remove ion from an ion exchange resin. Ion exchange capable materials
have week chemical combination. The materials have metathesis property a positive ion by a positive ion,
negative ion by a negative ion.
Ion exchange resin is divided into two classes, which is a cation exchange resin and a anion exchange resin.
(1) a positive ion (a cation) exchange resin
R-SO
3
H + Na
+
-> R-SO
3
Na + H
+
(Strong Acid Cation exchange resin (SAC))
R-COOH + Na
+
-> R-COONa + H
+
(Weak Acid Cation exchange resin (WAC))
(2) a negative ion (anion) exchange resin
RNOH + Cl
-
-> RNCl + OH
-
(Strong Base Anion exchange resin (SBA ))
RNH
3
OH + Cl
-
-> RNH
3
Cl + OH
-
(Weak Base Anion exchange resin (WBA))
A rule of ion exchange
(1) Generally in the case of low density, high atomic value ion is well exchange, absorption at normal
temperature aqueous solution
(2) In the case of same atomic value ion small
semi-diameter
advantageous
at low density aqueous solution.
