Now that is all clear to some, some of us are all confused. Titrate on not titrate. Ramon > -----Original Message----- > From: Rudy Sedlak [SMTP:[log in to unmask]] > Sent: Wednesday, September 24, 2003 10:42 AM > To: [log in to unmask] > Subject: Re: [TN] Saponifier Concentration > > Suppliers are often wrong about their own products...and merely mirror the > advice that the customers are used to receiving.... > > Yes, pH is virtually worthless when determining the concentration when the > cleaner is new.... > > So, when new, and ONLY when new, is titration a good control method.... > > However, as the solution becomes used, the MEA is consumed by reacting > with soils and Carbon Dioxide from the air...yet, it will still titrate, > not fully and completely, but it still registers as a source of alkali > during titration, thus titrating and giving a "false positive"...and thus > giving an artificially high reading... > > Tell me how well a very old, very used solution of saponifier cleans even > when it titrates as "full strength", as compared to a new solution? I > use this example as clear proof of the inaccuracy of the titration > method....yet, a solution of known strength of make up, always cleans the > same at the same pH.... making pH the more accurate method of determining > cleaning activity... > > Since both Brian and I are clearly obvious experts...in spite of the fact > that Brian recommended titrating with Stearic acid, which is soluble only > in alcohol, making the titrant volatile, and thus difficult to keep > constant in strength, the clear way to deal with this, is to both titrate, > especially when new, and do a pH. > > Good luck. > > Rudy Sedlak > RD Chemical Company > --------------------------------------------------- > Technet Mail List provided as a free 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 -----------------------------------------------------