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Displaying 1-2 of 2 results for Tag: anions
AN72481: Trace Anions by Single Pass AutoNeutralization and Ion Chromatography (IC): Anions in 5% NaOHInstrument Type: IC
Trace anions determinations in caustic solutions require high dilution to minimize column overload by the caustic sample. However, the high dilutions required prevent analysis of trace anionic contaminants. Here a single pass approach to neutralize the base sample is demonstrated using both suppressors run in recycle mode. The run time was reduced from 45 min in the previous version of this application, AN 93 using “Park and AutoNeutralize” to 12 min. This application is demonstrated on a 5% (w/w) sodium hydroxide sample. An ICS-6000 can be used for this application.
TN62: Reducing Carbonate Interference in Anion Determinations with the Carbonate Removal Device (CRD): Artificial Drinking Water SampleInstrument Type: IC
Carbonate can interfere with accurate quantification of adjoining anions, such as sulfate. Here we show the efficient removal of the carbonate peak from a synthetic drinking water sample using the Dionex CRD 200 device. In this example, the artificial drinking water sample (#2) contains: 0.1 mg/L of fluoride, nitrite, chlorate, bromide, and phosphate; 5 mg/L nitrate; 50 mg/L sulfate; 100 mg/L chloride and carbonate.