Determinations of trace anions in ultrapure water are important to the electronics industry. In this record, determinations of ng/L (ppt) anions using large volume concentration are made possible by the Electrolytic Water Purifier(EWP) and AutoPrep modules. Calibration standards are prepared using the AutoPrep large and small loops and EWP-purified water diluent, thereby increasing sensitivity by eliminating sources of contamination. The trace anions are separated on an IonPac AS17-C column designed to improve low level sulfate determinations using a Dionex Integrion compact IC system.

The determination of common inorganic anions in drinking water is one of the most important applications of ion chromatography (IC) worldwide. This application brief describes the fast determination of inorganic anions in drinking water samples with the Dionex ICS-5000 capillary system using the Dionex IonSwift MAX-100 column. The high pressure capability of this system facilitates higher sample throughput by simply increasing the flow rate of analysis.

Carbonate can interfere with accurate quantification of adjoining anions, such as sulfate. Here we show the efficient removal of the carbonate peak from a carbonated mineral water sample using the Dionex CRD 200 device.

Carbonate can interfere with accurate quantification of adjoining anions, such as sulfate and perchlorate. Perchlorate is a highly regulated contaminant (EPA Method 314) because of the health risks to pregnant women and prenatal and developing children. Here we show the efficient removal of the carbonate peak from a synthetic high ionic water sample using the Dionex CRD 200 device. In this example, the high ionic water matrix contains: 5 ppb perchlorate in 500 mg/L each of carbonate, sulfate and chloride.

Carbonate 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.