Analysis of low-level anions in water extracts of hard disk drive heads by capillary electrophoresis

Analysis of anionic contaminants in various electronic components is of importance in assessing cleanliness as well as in identifying contaminants in failed devices. Typically the levels of anionic contaminants is in the low μg/l range. Capillary electrophoresis (CE) is one technique that can be use...

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Bibliographic Details
Published in:Journal of Chromatography A 1996-09, Vol.745 (1), p.81-85
Main Author: Oehrle, Stuart A.
Format: Article
Language:English
Subjects:
Anions
Buffer composition
Hard disk drive leads
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Summary:Analysis of anionic contaminants in various electronic components is of importance in assessing cleanliness as well as in identifying contaminants in failed devices. Typically the levels of anionic contaminants is in the low μg/l range. Capillary electrophoresis (CE) is one technique that can be used to analyze these low level anions. Analysis of several water extracts of failed devices as well as various components of the drive head and assembly was done using CE with analysis times of less than 5 min. Two different concentrations and pH values of a chromate-based electrolyte were evaluated. Both electrolytes achieved detection limits of less than 1.2 μg/l using an electromigrative injection.
ISSN:0021-9673
DOI:10.1016/0021-9673(96)00267-1