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IcpCarb is a Matlab package that processes raw counts data from the iCAP (or other ICP instruments) and converts them to element ratios based on the determined standard curves and matrix curves.  License: Creative Commons Attribution-NonCommercial-No Derivatives 4.0 International (CC BY-NC-ND 4.0) References: Please cite the following references when using the IcpCarb package: Guo, W. (2024) IcpCarb: A Matlab package for processing element data from ICP analysis, http://doi.org/10.5281/zenodo.13929590. Lu, W., Guo, W., Oppo, D. (2024) Assessing the precision and accuracy of foraminifera elemental analysis at low ratios, Geochem. Geophys. Geosyst. Funding: Development of this package was supported by the U.S. National Science Foundation [NSF-OCE-1811305] and the Investment in Science Fund at Woods Hole Oceanographic Institution. 

Abstract The minor and trace element compositions of biogenic carbonates such as foraminifera are important tools in paleoceanography research. However, most studies have focused primarily on samples with element to calcium (El/Ca) ratios higher than the El/Ca range often found in benthic foraminifera. Here, we systematically assess the precision and accuracy of foraminifera elemental analysis across a wide range of El/Ca especially at relatively low ratios, using a method on a Thermo Scientific iCAP Qc quadrupole Inductively Coupled Plasma Mass Spectrometer (ICP‐MS). We focus on two benthic foraminifera species,Hoeglundina elegansandCibicidoides pachyderma, and prepared a suite of solution standards based on their typical El/Ca ranges to correct for signal drift and matrix effects during ICP‐MS analysis and to determine analytical precision. We observe comparable precisions with published studies at high El/Ca, and higher relative standard deviations for each element at lower El/Ca, as expected from counting statistics. The overall long‐term analytical precision (2σ) of theH. elegans‐like consistency standard solutions was 6.5%, 4.6%, 5.0%, for Li/Ca, Mg/Ca, Mg/Li, and 6.4%, 10.0%, 4.2% for B/Ca, Cd/Ca, Sr/Ca. The precision forH. elegans‐like Mg/Li is equivalent to a temperature uncertainty of 0.5–1.1°C. Measurement precisions were also assessed based on three international standards (one solution and two powder standards) and replicate measurements ofH. elegansandC. pachydermasamples. We provide file templates and program scripts that can be used to design calibration and consistency standards, prepare run sequences, and convert the raw ICP‐MS data into molar ratios. 

IcpCarb is a Matlab package that processes raw counts data from the iCAP (or other ICP instruments) and converts them to element ratios based on the determined standard curves and matrix curves.  License: Creative Commons Attribution-NonCommercial-No Derivatives 4.0 International (CC BY-NC-ND 4.0) References: Please cite the following references when using the IcpCarb package: Guo, W. (2024) IcpCarb: A Matlab package for processing element data from ICP analysis, Zenodo. http://doi.org/10.5281/zenodo.13929590 Lu, W., Guo, W., Oppo, D. W. (2024) Assessing the precision and accuracy of foraminifera elemental analysis at low ratios, Geochem. Geophys. Geosyst., 25, e2024GC011560. https:// doi.org/10.1029/2024GC011560 Funding: Development of this package was supported by the U.S. National Science Foundation [NSF-OCE-1811305] and the Investment in Science Fund at Woods Hole Oceanographic Institution.