I received a similar message from a post on the XRF-L list.  Thought it was a corporate response, until I saw this from Cory.  So I suspect many on the list have seen similar reply e-mails.



So I believe you when you say you are not a fraud.  ;  )



Lynn



Lynn M. Schurter, Ph.D.

Senior Scientist II, Leader IAL, Facility RSO

Owens Corning Science & Technology Center

2790 Columbus Road, Rt. 16

Granville, OH  43023-1200

Mail Drop 21-8

Phone:  (740) 321-5187

Fax:  (740) 321-4309

E-Mail:  [log in to unmask]









-----Original Message-----

From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). [mailto:[log in to unmask]] On Behalf Of Cory Larsen

Sent: Tuesday, March 21, 2017 12:29 PM

To: [log in to unmask]

Subject: Re: Variability of Ca with ICP-AES



I promise that I am not a fraud.  I am indeed who I appear to be.



Cory Larsen

QC Director

Cytozyme Labs

2600 South 600 West, South Salt Lake, UT 84115 [log in to unmask]

801-533-9208



-----Original Message-----

From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). [mailto:[log in to unmask]] On Behalf Of Cory Larsen

Sent: Tuesday, March 21, 2017 10:02 AM

To: [log in to unmask]

Subject: Variability of Ca with ICP-AES



[This sender failed our fraud detection checks and may not be who they appear to be. Learn about spoofing at http://aka.ms/LearnAboutSpoofing]



We are having problems with reproducibility of calcium on our P-E Optima 2100 ICP-OES. Most elements do well to within +/- 3-4 %, but we can't get calcium to closer than +/- 10%.



Do we need an internal standard? Do we need an ionization buffer? My understanding is that buffers are mostly for alkali metals in axial viewing mode. Calcium is an alkaline earth, of course, and we look at it in radial mode.



Any suggestions? Thanks.



Cory Larsen

QC Director

Cytozyme Labs

2600 South 600 West, South Salt Lake, UT 84115 [log in to unmask]

801-533-9208





The information contained in this communication and its attachment(s) is intended only for the use of the individual to whom it is addressed and

may contain information that is privileged, confidential, or exempt from disclosure. If the reader of this message is not the intended recipient,

you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this

communication in error, please notify [log in to unmask] and delete the communication without retaining any copies. Thank you.



Translations available: http://www.owenscorning.com/emailfooter.html