Dear Mark,

Thank you very much for providing a link to your website. Can you please offer details on how you measured the stable isotope ratios of your standard materials? Which laboratories made how many measurements with which standard deviation? Which international reference materials were used for normalization? Was two-point normalization employed? I apologize in advance if your website offers some or all of this information and I missed it.

Thank you very much!

Arndt Schimmelmann

On 9/11/2019 4:12 PM, Scott Hughes wrote:
You can see our range of standard for isotopes at
Elemental Microanalysis holds ISO 17034 certification for the production of certified reference standards.
Scott Hughes
EA Consumables, Inc.
5090 Central Hwy STE 3A
Pennsauken, NJ 08109-4637
Toll Free: 855-695-1312 x301
Fax:         856-343-0550
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----------------------- Original Message -----------------------
From: "Monk, Stephen M." <[log in to unmask]>
To: [log in to unmask]
Date: Wed, 11 Sep 2019 20:08:19 +0000
Subject: [ISOGEOCHEM] solid Nitrogen standard for elemental analysis

Hi all,


Can anyone recommend readily available, low % N solid standards for elemental analysis?







Mark Monk

Laboratory Manager

Urban Environmental Biogeochemistry Laboratory

Fisher College of Science and Mathematics

Towson University

P: 410-704-2566

E: [log in to unmask]



Arndt Schimmelmann, Ph.D. 
Senior Scientist 
Indiana University 
Dept. Earth and Atmospheric Sciences 
1001 East 10th Street 
Bloomington, IN 47405-1405
Ph   (812) 855-7645
e-mail:   [log in to unmask]