TY - JOUR T1 - Rapid extraction of dissolved inorganic carbon from seawater and groundwater samples for radiocarbon dating JF - LIMNOLOGY AND OCEANOGRAPHY-METHODS Y1 - 2016 A1 - Gospodinova, K. A1 - McNichol, A. P. A1 - Gagnon, A. A1 - Walter, S. R. Shah AB - We designed and developed a system to efficiently extract dissolved inorganic carbon (DIC) from seawater and groundwater samples for radiocarbon dating. The Rapid Extraction of Dissolved Inorganic Carbon System (REDICS) utilizes a gas-permeable polymer membrane contactor to extract the DIC from an acidified water sample in the form of carbon dioxide (CO2), introduce it to a helium gas stream, cryogenically isolate it, and store it for stable and radiocarbon isotope analysis. The REDICS system offers multiple advantages to the DIC extraction method which has been used for the last several decades at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) at the Woods Hole Oceanographic Institution, including faster DIC extraction, streamlined analysis, and minimized set-up and prep time. The system was tested using sodium carbonate and seawater standards, duplicates of which were also processed on the water stripping line (WSL) at NOSAMS. The results demonstrate that the system successfully extracts, quantifies, and stores more than 99% of the DIC in less than 20 min. Stable and radiocarbon isotope analysis demonstrated system precision of 0.04 parts per thousand and 7.8 parts per thousand, respectively. A Sargasso Sea depth profile was used to further validate the system. The results show high precision for both stable and radiocarbon analysis with pooled standard deviations of 0.02 parts per thousand and 5.6 parts per thousand, respectively. A comparison between the REDICS and WSL analyses indicates a good accuracy for both stable and radio-isotope analysis. VL - 14 ER - TY - JOUR T1 - Plans for Expanded 14C Analyses at the NOSAMS Facility--a status and progress report. 9th International Conference on Accelerator Mass Spectrometry, Nagoya, Japan, 9/2002 JF - Nuclear Instruments and Methods in Physics Research Y1 - 2004 A1 - von Reden, K. A1 - Donoghue, J. A1 - Elder, K. A1 - Gagnon, A. A1 - Gerlach, D. A1 - Griffin, V. S. A1 - Healy, R. A1 - Long, P. A1 - McNichol, A. P. A1 - Percy, D. A1 - Roberts, M. L. A1 - Schneider, R. J. A1 - Xu, L. A1 - Hayes, J. VL - B 223-224 N1 - id: 1810 ER - TY - CONF T1 - Plans for expanded 14C analyses at the NOSAMS facility - a status and progress report T2 - International Conference on Accelerator Mass Spectrometry Y1 - 2002 A1 - von Reden, K. F. A1 - Donoghue, J. A1 - Elder, K. A1 - Gagnon, A. A1 - Gerlach, D. A1 - Griffin, V. A1 - Healy, R. A1 - Long, P. A1 - McNichol, A. A1 - Percy, D. A1 - Roberts, M. L. A1 - Schneider, R. J. A1 - Xu, L. A1 - Hayes, J. M. JF - International Conference on Accelerator Mass Spectrometry CY - Nagoya, Japan N1 - id: 1685 ER - TY - CONF T1 - Ten Years After--The WOCE AMS Radiocarbon Program T2 - 8th International Conference on Accelerator Mass Spectrometry Y1 - 1999 A1 - McNichol, A. A1 - Schneider, R. A1 - von Reden, K. A1 - Gagnon, A. A1 - Elder, K. A1 - Key, R. A1 - Quay, P. JF - 8th International Conference on Accelerator Mass Spectrometry CY - Vienna, Austria N1 - id: 1757 ER -