Monitoring trace anion contamination in disk drive components.
Ion chromatography was used to determine trace anionic contamination on the surface of hard disk drive components. These contaminants can have a detrimental effect on device reliability and yield. Disk drive components were soaked in deionized water and these extracts were analyzed for anions. The anions fluoride, acetate, formate, acrylate, methacrylate, chloride, nitrite, bromide, nitrate, benzoate, sulfate, oxalate, phthalate and phosphate were separated on a high-performance anion-exchange column and determined at concentrations less than 1 microg/l with suppressed conductivity detection. The extract solutions were analyzed either by injecting 1 ml or by preconcentrating 5 ml. We evaluated the performance of both methods.
Kaiser
Edward
E
Dionex Corporation, PO Box 3603, 1228 Titan Way, Sunnyvale, CA 94088-3603, USA. edward.kaiser@dionex.com
Rohrer
Jeff
J
Campbell
Faye
F
D000838:Anions / Q000032:analysis*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002852:Chromatography, Ion Exchange / Q000379:methods; D003201:Computers; D008832:Microchemistry; D012680:Sensitivity and Specificity; D012996:Solutions
D000838:Anions; D012996:Solutions