Environmental applications of a cryptand adjustable-capacity anion-exchange separator.
A 2.2.2 cryptand-based anion exchanger was recently introduced as a commercial product. This new technology relies on a covalently bonded 2.2.2 cryptand, which allows one to selectively control the capacity of the column simply by the choice of eluent. This provides the analyst with more flexibility over conventional anion exchangers to suit the needs of the sample matrix. Since that time, a 2.2.1 version has also been developed and studied. In this paper we will compare the two types of columns and choose the best one for analyzing several environmental samples.
Woodruff
Andy
A
Dionex Corporation, 1228 Titan Way, Sunnyvale, CA 94085, USA. andy.woodruff@dionex.com
Pohl
Christopher A
CA
Bordunov
Andrei
A
Avdalovic
Nebojsa
N
D019342:Acetic Acid / Q000302:isolation & purification; D000838:Anions; D019086:Bridged Bicyclo Compounds, Heterocyclic; D002412:Cations; D002852:Chromatography, Ion Exchange / Q000379:methods*; D007475:Ion Exchange Resins; D019344:Lactic Acid / Q000302:isolation & purification; D014867:Water / Q000737:chemistry*
D000838:Anions; D019086:Bridged Bicyclo Compounds, Heterocyclic; D002412:Cations; D007475:Ion Exchange Resins; D014867:Water; C006071:cryptating agent 222; C053547:cryptating agent 221; D019344:Lactic Acid; D019342:Acetic Acid