Is anyone aware of any actual standards? I routinely calibrate the ph meter each time we use it. I calibrate, and then take the reading of the newly made buffer. Is this sufficient? I recently had my compliance officer tell me the this was not sufficient. She thinks we need to calibrate, take a reading of a solution with a known ph, and then take the reading of the new solution. What is everyone doing??????? Thank you, Melissa
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jan Shivers Sent: Tuesday, February 01, 2011 3:13 PM To: Susan Bachus; histonet; Akemi Allison Subject: Re: [Histonet] calibration of pH meter For our equipment quality control, we're required to record every single calibration value each time we calibrate/verify pHs. The document is reviewed regularly to see if there are any abnormal out-of-range pH-ing trends starting to happen. We also aren't allowed to put the probe into the various pH buffer bottles, but need to pour buffers into separate beakers and use them once, then toss. Jan Shivers ----- Original Message ----- From: "Susan Bachus" <[email protected]> To: "histonet" <[email protected]>; "Akemi Allison" <[email protected]> Sent: Tuesday, February 01, 2011 1:49 PM Subject: Re: [Histonet] calibration of pH meter > This may sound simplistic, but it works for us: whenever I need to use > pH something, I quickly first dunk the electrode in the buffers above & > below what I'm pHing (rinsing after each dunk, of course)--if the meter > reads accurately I proceed to measure, if it's off by more than a few % I > recalibrate before measuring. It's true that a new electrode can stay > well calibrated for long periods. Susan > ----- Original Message ----- > From: "Jan Shivers" <[email protected]> > To: "histonet" <[email protected]>; "Akemi Allison" > <[email protected]> > Sent: Tuesday, February 01, 2011 1:36 PM > Subject: Re: [Histonet] calibration of pH meter > > >> We calibrate our pH meter every day that it's used, which can be daily >> during heavy workload weeks, using multiple calibration buffers. >> >> Jan Shivers >> UMN Vet Diag Lab >> >> ----- Original Message ----- >> From: "Akemi Allison" <[email protected]> >> To: "histonet" <[email protected]> >> Sent: Tuesday, February 01, 2011 7:54 AM >> Subject: [Histonet] calibration of pH meter >> >> >>> Good morning everyone, >>> >>> I am curious how frequently you all calibrate your pH meter, >>> particularly when you make up solutions for muscle bx's? Do you do it >>> daily, weekly, or monthly? I am trying to come up with an acceptable >>> standard in a clinical histology lab, verses a biotech lab, which >>> makes-up large quantities of reagents on a daily basis. >>> >>> Thank you in advance for your information, >>> Akemi >>> >>> >>> Akemi Allison BS, HT (ASCP) HTL >>> Director >>> Phoenix Lab Consulting >>> Tele: 408.335.9994 >>> E-Mail: [email protected] >>> >>> _______________________________________________ >>> Histonet mailing list >>> [email protected] >>> http://lists.utsouthwestern.edu/mailman/listinfo/histonet >>> >> >> >> _______________________________________________ >> Histonet mailing list >> [email protected] >> http://lists.utsouthwestern.edu/mailman/listinfo/histonet > > > _______________________________________________ > Histonet mailing list > [email protected] > http://lists.utsouthwestern.edu/mailman/listinfo/histonet > _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet The information in this e-mail, and any attachments therein, is confidential and for use by the intended addressee only. If this message is received by you in error please do not disseminate or read further. Please reply to the sender that you have received the message in error, then delete the message. Although Catholic Health Services of Long Island attempts to sweep e-mail and attachments for viruses, it does not guarantee that either are virus-free and accepts no liability for any damage sustained as a result of viruses. Thank you. _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet
