@article {6838,
	title = {COMPARING DIRECT CARBONATE AND STANDARD GRAPHITE 14C DETERMINATIONS OF BIOGENIC CARBONATES},
	journal = {Radiocarbon},
	year = {2021},
	note = {n/a},
	month = {2021},
	pages = {1-17},
	publisher = {Cambridge University Press},
	abstract = {<p>The direct carbonate procedure for accelerator mass spectrometry radiocarbon (AMS 14C) dating of submilligram samples of biogenic carbonate without graphitization is becoming widely used in a variety of studies. We compare the results of 153 paired direct carbonate and standard graphite 14C determinations on single specimens of an assortment of biogenic carbonates. A reduced major axis regression shows a strong relationship between direct carbonate and graphite percent Modern Carbon (pMC) values (m = 0.996; 95\% CI [0.991{\textendash}1.001]). An analysis of differences and a 95\% confidence interval on pMC values reveals that there is no significant difference between direct carbonate and graphite pMC values for 76\% of analyzed specimens, although variation in direct carbonate pMC is underestimated. The difference between the two methods is typically within 2 pMC, with 61\% of direct carbonate pMC measurements being higher than their paired graphite counterpart. Of the 36 specimens that did yield significant differences, all but three missed the 95\% significance threshold by 1.2 pMC or less. These results show that direct carbonate 14C dating of biogenic carbonates is a cost-effective and efficient complement to standard graphite 14C dating.</p>
},
	keywords = {biogenic carbonate, direct carbonate 14C AMS, standard graphite 14C AMS},
	isbn = {0033-8222},
	url = {https://www.cambridge.org/core/article/comparing-direct-carbonate-and-standard-graphite-14c-determinations-of-biogenic-carbonates/D63FB9D8A4F00C9E91584636A818D2AA},
	author = {Bright, Jordon and Ebert, Chris and MATTHEW A. KOSNIK and Southon, John R and Whitacre, Katherine and Albano, Paolo G and Flores, Carola and Frazer, Thomas K and Hua, Quan and Kowalewski, Michal and Martinelli, Julieta C and Oakley, David and Parker, Wesley G and Retelle, Michael and MATIAS DO NASCIMENTO RITTER and Rivadeneira, Marcelo M and Scarponi, Daniele and Yanes, Yurena and Zuschin, Martin and DARRELL S. KAUFMAN}
}
