In a message dated 5/13/00 1:15:05 AM US Eastern Standard Time,
[log in to unmask] writes:

<< From your description, it seems likely your halides are inorganic. As
 such, they are readily ionised and a cheap way of doing the tracing is
 with an ionic contamination tester (e.g. Contaminometer, Omega Meter,
 etc...). >>

Unfortunately, the bulk ionic testers you reference fall short of telling you
how much of what halide exists.  Thererfore, bulk ionic testers tend to be
limited to monitoring process control.  A systematic analysis requires a much
more precise method.  One such method is ion chromatography.  This method can
easily determine how much of a halide is present in solution, such as
chloride. bromide, sulfate, and weak organic acid (activators in fluxes,
particularly low solids, no-clean fluxes) at a given point in the
manufacturing process.

Hope this helps.

Dave Morrow
Contamination Studies Laboratories, Inc.

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