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AN153: Monitoring for Trace Anion Contamination in the Extracts of Electronic Components.

Instrument Type: IC

This application note focuses on the determination of ionic contamination of disk drive components. A comprehensive anion analysis of drive components prior to manufacturing can significantly reduce the incidence of corrosion and head-to-disk interface failures. The anions most routinely monitored are fluoride, chloride, bromide, nitrate, sulfate, and phosphate. High-volume direct injection and preconcentration are the two methods used to increase IC sensitivity. This note describes the use of these approaches to determine trace anion contaminants in extracts of disk drive components.

AN146: Determination of Trace Anions in High-Purity Waters by Ion Chromatography Using High Volume Direct Injection.

Instrument Type: IC

This application note describes an ion chromatographic method using the microbore IonPac AS17 column to determine trace concentrations of common inorganic anions, low-molecular-weight organic acids, as well as acrylate, methacrylate, benzoate, and phthalate. These contaminants can come from some of the following sources: cleaning agents, adhesives, oils, and solder fluxes. Anionic contamination is known to cause corrosion in microelectronic circuitry. The analytes are detected by suppressed conductivity with a 2-mm ASRS ULTRA operated in the “Gas-Assisted Recycle” mode.

AN206: Determination of Oxalate and Other Anions in Bayer Liquor Using Ion Chromatography

Instrument Type: IC

A direct injection method was designed using a Reagent‑Free™ Ion Chromatography (RFIC™) system with in-line sample cleanup to accurately and reproducibly measure oxalate in Bayer liquor. The online sample preparation removes most of the aluminum so that it does not contaminate either the column or suppressor. Fluoride is used to promote ligand exchange with oxalate for aluminum. This online sample preparation method allows an accurate, reproducible, and rugged determination of oxalate in Bayer liquor.