Greaves, Mervyn, Barker, Stephen  ORCID: https://orcid.org/0000-0001-7870-6431, Daunt, C. and Elderfield, H.
2005.
Accuracy, standardization, and interlaboratory calibration standards for foraminiferal Mg/Ca thermometry.
Geochemistry Geophysics Geosystems
6
(2)
, Q02D13.
10.1029/2004GC000790
|
Preview |
PDF
- Published Version
Download (381kB) | Preview |
Abstract
The use of liquid and solid standards for foraminiferal Mg/Ca and Sr/Ca determinations and interlaboratory calibration has been investigated. Preparation of single element standard solutions from primary solid standard material enables the preparation of mixed standard solutions with Mg/Ca and Sr/Ca ratios of known accuracy to better than 0.1%. We also investigated commercial reference materials to determine whether existing carbonate standards could be used as reference material for Mg/Ca determinations in foraminiferal calcite. We propose that, in the absence of a pure calcium carbonate standard certified for Mg/Ca, ECRM 752-1, a limestone CRM containing Mg/Ca within the range of typical foraminifera, is a suitable solid standard for interlaboratory calibration. Replicate Mg/Ca determinations showed that, provided silicate phases are removed by centrifugation, this material is homogenous within the precision of daily instrumental Mg/Ca determinations over a range of sample weights from 10 to 1000 mg, taken from two separate bottles of ECRM 752-1. Results gave an average value of Mg/Ca = 3.75 mmol/mol (0.015 s.d., 0.41% r.s.d.) on 118 determinations from the two bottles.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Earth and Environmental Sciences |
| Subjects: | G Geography. Anthropology. Recreation > GC Oceanography Q Science > QE Geology |
| Additional Information: | Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1525-2027/ (accessed 20/02/2014). |
| Publisher: | American Geophysical Union. |
| ISSN: | 1525-2027 |
| Date of First Compliant Deposit: | 30 March 2016 |
| Last Modified: | 07 May 2023 07:17 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/11145 |
Citation Data
Cited 47 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
 |
Edit Item |
Dimensions
Dimensions