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PLASMACHEM-L  September 2011

PLASMACHEM-L September 2011

Subject:

Re: Copper in DRC-ICP-MS

From:

James Neal-Kababick <[log in to unmask]>

Reply-To:

PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's).

Date:

Fri, 2 Sep 2011 21:14:33 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (1 lines)

Great, the regeneration of the getter seems to have solved the problem.  Let's keep our fingers crossed.  This is something that has to happen every once in a while.  Keep me updated. 





Sincerely,



James Neal-Kababick

Director

Flora Research Laboratories

An FDA and DEA Registered & Inspected Laboratory

Fellow AOAC International

Adjunct Faculty Bastyr University

Botanical Medicine Department

[log in to unmask]

www.floraresearch.com





CAUTION:

This e-mail and its accompanying attachments, if any,  may contain information that is confidential and subject to legal privilege. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message is prohibited. If you have received this  message in error, please notify Flora Research Laboratories immediately and destroy all copies of this message and the accompanying attachments. Thank you.







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

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

Sent: Friday, September 02, 2011 11:58 AM

To: [log in to unmask]

Subject: Re: Copper in DRC-ICP-MS



We had the ICP-MS service engineer here this past Monday to regenerate the getter. We were finally able to run today, and it does to appear to have work. The Cu63 levels are similar to what we have been seeing in the past.



I will feel a little more comfortable with my conclusion in a month or two if the Cu63 levels stay near theoreticals.



Jaime



Jaime S. Goldfuss

Media Analytical Services/PD-Direct®

Life Technologies

3175 Staley Road

Grand Island, NY 14072

 

(716) 774-6806 - phone

(716) 774-6996 - fax

[log in to unmask]

http://www.lifetechnologies.com





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

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

Sent: Tuesday, August 23, 2011 12:08 PM

To: [log in to unmask]

Subject: Re: Copper in DRC-ICP-MS



At this point I would get a Product Specialist from PE involved. That is what they are there for. You may have some other issue and they may be able to nail it down. Any issue that we have had has been resolved by our PS or SE.  It sounds like it could be an anomalous issue if all things are cetris paribus. 



Is another instrument available to run the sample on at your lab?  If not, have PE run it at their app lab to see if they have the same issue. 



If retains are available to you, it might be worthwhile to run an old problem free sample and the current one using Totalquant to check for the possibility of a new undeclared matrix interference. 



 

Sincerely,

James Neal-Kababick

Director

Flora Research Laboratories

An FDA & DEA Registered and Inspected Facility

Fellow of AOAC International

Adjunct Faculty 

Bastyr University Botanical Medicine Department

[log in to unmask] 

www.floraresearch.com 

Sent from BB wireless 



CAUTION:

This e-mail and its accompanying attachments, if any,  may contain information that is confidential and subject to legal privilege. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message is prohibited. If you have received this  message in error, please notify Flora Research Laboratories immediately and destroy all copies of this message and the accompanying attachments. Thank you.



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

From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). <[log in to unmask]>

To: [log in to unmask] <[log in to unmask]>

Sent: Tue Aug 23 11:32:27 2011

Subject: Re: Copper in DRC-ICP-MS



The samples have been in the same matrix, concentration of the components may vary slightly from sample to sample, but not by much.



The cones have been the same type since install, and we do clean them regularly.



The matrix does contain about 1.58 g/L Na2HPO4, but we had optimized the DRC mode for this.



What other info would be useful to troubleshoot? We been troubleshooting for about 1.5 months.



Jaime S. Goldfuss

Media Analytical Services/PD-Direct®

Life Technologies

3175 Staley Road

Grand Island, NY 14072

 

(716) 774-6806 - phone

(716) 774-6996 - fax

[log in to unmask]

http://www.lifetechnologies.com

 

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

From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). [mailto:[log in to unmask]] On Behalf Of Pappas, Richard Steve (CDC/ONDIEH/NCEH)

Sent: Monday, August 22, 2011 3:49 PM

To: [log in to unmask]

Subject: Re: Copper in DRC-ICP-MS



Good afternoon, Jaime,

Are you looking at the same matrix, or a different one?

Different type of cones?

Dirty cones?

23Na40Ar is the most commonly known interference at mass 63.

If you have a buildup on cones that increases the Na in the ion beam, that could be one cause.

A second reason could be a switch from Pt-tipped to Ni, copper-based, or Al cones. All of these will transfer heat better and run cooler than a Pt-tipped cone. A cooler plasma layer at the cone tends to permit higher polyatomics unless you adjust in another way.

Not enough info to troubleshoot further.



R. Steven Pappas, Ph.D.

Smoke Analysis Group

Centers for Disease Control & Prevention

4770 Buford Hwy, M.S. F-44

Atlanta, GA USA 30341-3717

770-488-4661

[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 Goldfuss, Jaime

Sent: Monday, August 22, 2011 3:21 PM

To: [log in to unmask]

Subject: Copper in DRC-ICP-MS



We are currently having problems (elevated levels) with Cu63 in DRC mode, 0.6mL/min NH3, 0.7 RPq. We have ran the same method for approximately two years without any problems.



All other metals of interest seem to be right within target ranges.



In troubleshooting, we ran Cu65 in DRC mode, 0.6mL/min NH3, 0.85 RPq alongside Cu63 and achieved target concentrations from Cu65 but a 4 to 3 fold increase in concentration for Cu63.



We do realize that there is something interfering with Cu63, but not sure why not after a couple of years of running the method.



We have an Elan DRC II



Any suggestions on where to look? Getter regeneration?



Thank you



Jaime S. Goldfuss

Media Analytical Services/PD-Direct®

Life Technologies

3175 Staley Road

Grand Island, NY 14072

 

(716) 774-6806 - phone

(716) 774-6996 - fax

[log in to unmask]

http://www.lifetechnologies.com

 

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