Depends what you mean by correlation. 1) If (unlikely) all the ions present in contamination can be measured in the chromatograph and if (equally unlikely) the extraction process is the same, then IC and ionic contamination testing should correlate. In practice, it won't a) because you measure only the ions that you have tubes/detectors for and b) the extraction conditions differ (especially the Ionograph method). 2) There cannot be any correlation between SIR and either ion testing method, in practice. In theory, if the contamination consists only of a single species of an ionic salt, then pure SIR will correlate non-linearly, but ECMR (which is more commonly measured than SIR, although it is equally commonly and mistakenly confused for SIR) will not necessarily correlate. To illustrate: imagine an SIR test pattern contaminated only with sugar. The SIR will be low but the ionic testing will indicate zero. OTOH, a light contamination with some salts with a very low hygroscopicity may indicate a high SIR but low ionic contamination. Brian Matthew Park wrote: > Dear Technet, > > Is there a correlation between Ion chromatography test result vs > SIR/Ionography? I done some tests years ago and found no correlation btw > IC vs SIR. Where can I get some info about technical studies done about > IC/SIR. > > thanks > Matthew > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- > > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------