ANIONS: IC columns used with and without chemical suppression

The Metrosep Dual 3 IC anion column is a PEEK column. This column is primarily used for critical samples. The Metrosep Dual 2 IC anion column is based on an acrylate polymer. It can be used with the usual phthalate eluents and a number of other eluent systems without chemical suppression. This means that the advantages of working without chemical suppression - simpler analytical methods and linear calibration - can be exploited. With chemical suppression the column impresses with its outstanding separating efficiency, particularly of the early eluting ions (fluoride, acetate, formate). Worthy of note is the separation between fluoride and the «water dip» and between chloride and nitrite. We recommend the use of the Metrosep RP Guard to increase the working life of the column even further. Do not use TRIS. The carbonate peak does not interfere with either chloride or nitrite; system peak: between chloride and nitrite.