Does anyone know a test method to determine the concentration of flux built up
in a water wash reservoir?  We currently monitor the saponifier concentration,
Loncoterge 530, we use in our board wash.  I want to do a correlation study of
the effects of flux concentration in the wash cycle to the rate at which there
is resistivity loss in the rinse cycle.

What I am trying to do is set this up as a SPC parameter so that we can monitor
& how this impacts the resistivity.  The cation/anion beds for the rinse are
very expensive and I am trying to see what we can do to extend the life of
them...  Also, I want to see if this has any impact on our ionic contamination
after the wash.

Thanks in advance,

Rob Watson
Quality Assurance
Sanmina Corp. Plant 10
Durham, NC

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