Strontium Isotope Materials
Best suited for stable isotope studies is the 88Sr/86Sr isotope ratio. However, the majority of strontium isotopic analyses are focused on the determination of the radiogenic 87Sr for Rb/Sr dating or studies of material origin. Stable isotopic variations of strontium are used in provenance studies of water and food, for studying biological migration and environmental cycles, and in archaeometry and forensic science. Additionally, δ88/86Sr values are used as a paleo-thermometer since the values found in seawater corals reflect the water temperature during coral growth.
|NIST SRM 987||SrCO3||0 ‰*|
|OSIL IAPSO||seawater||+0.386(5) ‰|
|NRC TORT-3||lobster hepatopancreas||+0.454(30) ‰|
|NRC DOLT-4||dogfish liver||+0.207(12) ‰|
|BHVO-2||basalt||+0.25(2) ‰ **|
|BCR-2||basalt||+0.22(2) ‰ **|
|W-2||diabase||+0.24(3) ‰ **|
|JA-2||andesite||+0.19(2) ‰ **|
|G-2||granite||+0.36(3) ‰ **|
|JG-2||granite||-0.20(2) ‰ **|
* Exact value defining the δ88/86SrSRM986 scale.
** See the Assessment of international reference materials for isotope-ratio analysis for more details.
Values in parenthesis are expanded (k = 2) uncertainties applicable to the last digits. The values listed in this table are compilation and are not necessarily CIAAW recommendations.