Se - Selenium

Click on the material to see more complete information about its chemical composition.
Element CCRMP
Material		 Concen-
tration		 Units Classification*
Se CH-4 2.1 µg/g Certified
Se SSC-1 7.28 µg/g Certified
Se CZN-4 86.7 µg/g Certified
Se CCU-1c 107 µg/g Certified
Se CUPD-1 237 µg/g Certified
Se WPR-1 4 µg/g Provisional
Se SU-1b 20.7 µg/g Provisional
Se CUAR-1 26 µg/g Provisional
Se RTS-3a 44.8 µg/g Provisional
Se CCU-1d 244 µg/g Provisional
Se TDB-1 0.7 µg/g Informational
Se DS-1 1 µg/g Informational
Se CPB-2 10 µg/g Informational
Se RTS-1 40 µg/g Informational
Se RTS-2 57 µg/g Informational
Se WMS-1a 87 µg/g Informational
Se RTS-4 100 µg/g Informational
Se SY-4 0.01 – 4 µg/g Informational
Se WGB-1 0.1-0.8 µg/g Informational
Se CZN-3 110 - 115 µg/g Informational

 

*Classification of the results by level of agreement

All concentration values are derived from an interlaboratory measurement program. Samples are sent to many laboratories, typically twenty to forty, and the results are analyzed statistically to determine the mean and other statistical parameters.

Certified: The value is calculated from a minimum of 10 sets of data that fulfill specific statistical criteria regarding agreement.

Provisional: The value is calculated from 8 or 9 sets of data that fulfill specific statistical criteria regarding agreement; or alternatively, more than 9 sets of data that do not fulfill the specific statistical criteria required for certification.

Informational: The value is calculated from 7 or fewer sets of data.

Note: Because of different digestion methods used, a single material may show different concentrations for a specific element. Details about methods are provided on the certificate and in the report.