Let's hear it for SANITY!!! -----Original Message----- From: Steve R Mikell [mailto:[log in to unmask]] Sent: Thursday, December 03, 1998 9:06 AM To: [log in to unmask] Subject: Re: [TN] Q on Ion Chromatography I've enjoyed all the wonderful technical analysis regarding the differences between Ion Chromatography and NaCl equivalence, which comes from the bulk ionic conductivity "process control" procedure. Many past discussions and research projects have established that the bulk ionic process control is NOT a quantitative lab methodology, but more akin to using a piece of hanging rope as a weather forecasting tool. The NaCl pass fail was devised in 1972, and as such, doesn't really apply to today's designs. Some of the ion species being detected in your IC tests do not contribute to field failures. Many field failures occur at chloride levels that pass the bulk ionic. If some customer has blindly imposed this spec on you, you need to educate him. If your fellow employees have imposed this requirement, you need to challange the validity and develop a test and limit that provides real value to your company and its customers. Does anyone want to offer a sane set of limits to be imposed on components based on IC testing??? Doug and Terry @ CSL, are you listening? anybody else? Sorry, but I had to rant. Steve Mikell SCI P13 ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################