Th - Thorium

Click on the material to see more complete information about its chemical composition.
Element CCRMP
Material		 Concen-
tration		 Units Classification*
Th SY-4 1.4 µg/g Certified
Th TDB-1 2.7 µg/g Certified
Th UTS-3 10 µg/g Certified
Th UTS-4 15.4 µg/g Certified
Th UTS-1 138 µg/g Certified
Th UTS-2 174 µg/g Certified
Th DL-1a 0.0076 % Certified
Th DH-1a 0.091 % Certified
Th OKA-2 2.893 % Certified
Th-228 UTS-1 0.71 Bq/g Certified
Th-228 UTS-2 0.92 Bq/g Certified
Th-232 UTS-1 0.68 Bq/g Certified
Th-232 UTS-2 0.88 Bq/g Certified
Th-230 CLV-2 0.033 Bq/g Certified
Th-230 CLV-1 0.31 Bq/g Certified
Th-230 UTS-1 3.6 Bq/g Certified
Th-230 UTS-2 4.4 Bq/g Certified
Th-230 UTS-3 11.3 Bq/g Certified
Th-230 UTS-4 22.9 Bq/g Certified
Th WPR-1 0.4 µg/g Provisional
Th LKSD-1 2.2 µg/g Provisional
Th STSD-1 3.7 µg/g Provisional
Th STSD-4 4.3 µg/g Provisional
Th TILL-3 4.6 µg/g Provisional
Th LKSD-4 5.1 µg/g Provisional
Th TILL-1 5.6 µg/g Provisional
Th STSD-3 8.5 µg/g Provisional
Th LKSD-3 11.4 µg/g Provisional
Th LKSD-2 13.4 µg/g Provisional
Th TILL-4 17.4 µg/g Provisional
Th TILL-2 18.4 µg/g Provisional
Th CLV-2 0.14 µg/g Informational
Th CLV-1 0.53 µg/g Informational
Th HV-2 0.97 µg/g Informational
Th WGB-1 1.0-1.6 µg/g Informational
Th WMS-1a 1.2 µg/g Informational
Th RTS-3a 1.4 µg/g Informational
Th CH-4 2 µg/g Informational
Th FER-2 3 µg/g Informational
Th DS-1 4 µg/g Informational
Th MA-2c 9.2 µg/g Informational
Th MP-1b 50 µg/g Informational
Th BL-5 0.004 % Informational
Th-228 UTS-3 0.16 Bq/g Informational
Th-228 UTS-4 0.23 Bq/g Informational
Th-232 CLV-2 6E-04 Bq/g Informational
Th-232 CLV-1 0.0022 Bq/g Informational
Th-232 UTS-3 0.16 Bq/g Informational
Th-232 UTS-4 0.48 Bq/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.