Acceptance Criteria Ion Chromatography testing?

Simple answer is no, there is no universally acknowledged acceptance criteria. Some time ago, I started a spreadsheet with the acceptance levels suggested by various labs on the individual ionic species. All are relatively close in their individual allowables, but there are slight differences. One of the biggest differences are the levels associated with cleaned and no-clean assemblies. Another potential roadblock to an acceptance criteria is IPC's 3 classes of electronics. What is a defect for class 3 can be acceptable for class 1, so manufacturers would most likely require 3 classes for ionic residues as well.

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rsthompson ... if you're talking about bare boards

IPC-5701, Users Guide for Cleanliness of Unpopulated PBC, Table 8
||Bare board final surface finish
Ions||Hot air solder level||OSP over copper||Gold over nickel
Chloride||0.75 ug/cm^2||0.75 ug/cm^2||0.75 ug/cm^2
Bromine||1.0 ug/cm^2||1.0 ug/cm^2||1.0 ug/cm^2
Sodium + Potassium||2.0 ug/cm^2||4.0 ug/cm^2||2.0 ug/cm^2
Calcium+ Magnesium [*]||3.0 ug/cm^2||3.0 ug/cm^2||3.0 ug/cm^2
Total inorganic||3.8 ug/cm^2||5.9 ug/cm^2||3.8 ug/cm^2
[*] After 12/31/98, these ions will be included in the “Total inorganic Category as 3.8 ug/cm^2

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