General description
This certified reference material (CRM) is produced and
certified in accordance with ISO Guide 34:2009 and ISO/IEC 17025:2005.
This CRM is traceable according to the requirements of ISO Guide 34:2009
and ISO/IEC 17025:2005. All information regarding the use of this CRM
can be found on the certificate of analysis. Download your certificate
of analysis at: http://www.sigma-aldrich.com.
This product was produced and certified from a naturally
contaminated matrix and has not been fortified or modified in any way.
Analytical data for Certification was obtained using USEPA SW846, 3rd
edition methods 3050 (hot block) and 3051(microwave) using nitric acid
extraction. Analysis was carried out according to USEPA methods 6010
(ICP-ES), 6020 (ICP-MS) and 7000 (AES).
Other Notes
The following elements are not certified and are included for information only:
• Sb, B, Mo, Tl
Values of analytes vary lot to lot. Some lots may not contain all analytes.