Methodology: Boron Isotope Analysis

Purification: Quantitative recovery of boron from the matrix is required for boron isotope measurements in carbonates and water. Low-blank separation of boron from the matrix is conducted by means of extraction chromatography using boron-specific chelating resin (Amberlite IRA-743) following the method of Giri et al., 2019. 

B isotope measurement: Boron isotope measurements are performed with a Neptune Plus multi-collection inductively coupled plasma mass spectrometer (MC-ICP-MS) following the method in Giri et al., 2019.


References

Briand, C.; Plagnes, V.; Sebilo, M.; Louvat, P.; Chesnot, T.; Schneider, M.; Ribstein, P. and Marchet, P., 2013: Combination of nitrate (N, O) and boron isotopic ratios with microbiological indicators for the determination of nitrate sources in karstic groundwater. Environ. Chem., vol. 10, pp. 365–369. http://dx.doi.org/10.1071/EN13036.

Chalk, T.B.; Foster, G.L.; Wilson, P.A., 2019: Dynamic storage of CO2 in the Atlantic Ocean revealed by boron [CO32-] and pH record. Earth and Planetary Science Letters, vol. 510, pp. 1-11.

Giri, S.J.; Swart, P.K.; Pourmand, A., 2019: The influence of seawater calcium ions on coral calcification mechanisms: Constraints from boron and carbon isotopes and B/Ca ratios in Pocillopora damicornis. Earth and Planetary Sciences Letters, vol. 519, pp.130-140.

EPA-68-01-3201, 1976: Chemical technology and economics in environmental perspectives. Task II- Removal of Boron from wastewater. Environmental Protection Agency, Office of Toxic Substances, Washington, D.C. 20460