http://en.wikipedia.org/wiki/PH_indicator try this!!! -----Original Message----- From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] On Behalf Of Andrew Gross Sent: Wednesday, August 26, 2009 7:09 AM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: [DCHAS-L] pH Indicator Question Hi All, I'm in a bit of a pinch. I think my pH meter is down in my lab and I need to analyze some samples. I need to titrate some phosphoric acid sample with sodium hydroxide and I need a compatible indicator that will change at pH 9. If anyone knows off hand what that indicator is, please email me back and/or call my cell phone at 516-633-3528. Thanks, Andrew Gross
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