In ion-exclusion separations, Donnan exclusion causes strong acids to elute in the void volume of the column. Weak acids that are protonated in the acidic eluent are not subject to Donnan exclusion and penetrate into the pores of the resin. Separation is accomplished by differences in pKa, size, and hydrophobicity. Use Thermo Scientific™ Dionex™ IonPac™ ICE Ion Exclusion Columns for separations of aliphatic organic acids and alcohols in complex samples and monitoring trace levels of borate in high-purity water.
|Dionex™ IonPac™ ICE-AS1 IC Columns||Fast separation of aliphatic organic acids and alcohols in complex or high-ionic strength samples.||Ideal for electroactive ions such as cyanide and sulfite. Useful for organic acids and alcohols in complex sample matrices including: brines, mineral acids, wastewater, power plant water, foods and beverages, Kraft liquors and soil extracts.|
|Dionex™ IonPac™ ICE-AS6 IC Columns||Fast analysis of aliphatic organic acids and alcohols in complex or high-ionic strength samples, elution of strong acid anions into the void, difficult separations (e.g., tartrate from citrate, glycolate from lactate and formate, lactate from malate, and formate from succinate). Ideally suited for most applications performed on the ICE-AS1 column||Increased column selectivity useful in the determination of aliphatic organic acids and alcohols in matrices that include food and beverage products, biological samples, industrial process liquors, and wastewater.|
|Dionex™ IonPac™ ICE-Borate IC Columns||Monitoring of trace levels of borate in high-purity water; used with Dionex TBC-1 concentrator column and suppressed conductivity detection.||Borate testing for ng/L (ppt) detection in water purification systems.|