Eluant generator

A much more elegant way to prepare hydroxide eluants has recently been introduced by liu et al. [148]. The respective device was commercialized under the trade name Eluant Generator. The most important part of this module is a cartridge, in which potassium hydroxide is generated by means of electrolysis. As schematically depicted in Fig. 3-146, such a cartridge consists of an electrolyte reservoir, which is filled with KOH solution (c = 4 mol/L) and connected to an electrolysis chamber via a stack of cation exchange membranes. 

KOH (with Eluant Generator ) gradient 9 mmol/L isocratically for 7 min, then to 46 mmol/L in 11 min flow rate 1.6 mL/min detection suppressed conductivity injection volume 2000 pL solute concentrations 2 pg/L fluoride (1),... 

Fig. 9-16. Separation of haloacetic acids on a hydroxide-selective anion exchanger using a gradient elution technique. - Separator column lonPac AS16 eluant KOH with Eluant Generator gradient linear, 3 mmol/L to 60 mmol/L in 25 min flow rate 1 mL/min detection suppressed conductivity injection volume 25 pL solute concentrations (a)...

Fig. 9-39. Trace anion analysis with lonPac AS15 via direct injection utilizing an Eluant Generator. — Separator column lonPac AS15 (2-mm) eluant KOH gradient 8 mmol/L for 6 min isocratic, then linearly to 60 mmol/L in 10 min flow rate 0.5 mL/ min detection suppressed conductivity injection volume ...

Y. Liu, N. Avdalovic, J. Rohrer, M. Laikht-man, E. Kaiser and H, Dhillon, Determination of Trace Level Anions in High Purity Water by Ion Chromatography with On-line Eluant Generation. Presentation at the International Ion Chromatography Symposium, Osaka, Japan 1998. 

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