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TN62: Reducing Carbonate Interference in Anion Determinations with the Carbonate Removal Device (CRD): Trace Anions
Instrument Type: ICCarbonate can interfere with accurate quantification of adjoining anions, such as sulfate. Here we show the efficient removal of the carbonate peak from a trace analysis water sample using the Dionex CRD 200 device. In this example, a large volume (1000 uL) of water spiked with < 4 ug/L concentration of 17 anions is directly analyzed.
AN1107: Determination of Anions and Carboxylic Acids in Urban Fine Particles (PM2.5)
Instrument Type: ICIonic forms of air pollutants are analyzed here using anion-exchange chromatography and suppressed conductivity. The gas sample included particles < 2.5 um (PM2.5) was collected using ambient ion monitoring and then dissolved in deionized water. The dissolved inorganic anions and organic acids were separated on a 4 mm i.d. IonPac AS11-HC column and detected by suppressed conductivity. This method provided analysis of more ionic contaminants than standard methods (EPA Method 26A) and ASTM D5085-02). An ICS-6000 can be used for this application.
