2
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      A revolutionary graphitisation system: Fully automated, compact and simple

      , ,
      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
      Elsevier BV

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references8

          • Record: found
          • Abstract: found
          • Article: not found

          Automatic AMS Sample Combustion and CO2 Collection

          In Groningen, all organic samples for accelerator mass spectrometry (AMS) are combusted in an automatic Elemental Analyzer, coupled to an Isotope Ratio Mass Spectrometer and Cryogenic Trapping System. The Gas Chromatographic (GC) column, part of the Elemental Analyzer system, appeared to be the main cause for memory effects. Therefore we modified the Elemental Analyzer, such that the trapped CO2 no longer passed the GC column. Our system modification reduced the memory effect significantly, as shown by lower radiocarbon concentration values for anthracite backgrounds, and a much smaller spread in these values. Our modified system can perform up to 40 combustions unattended in about 6 hr.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            A Direct Method to Measure 14CO2 Lost by Evasion from Surface Waters

            Recent methodological advances in the use of zeolite molecular sieves for measuring the isotopic signature of CO2have provided the opportunity to make direct measurements of14CO2 in various field situations. We linked a portable molecular sieve/pump/IRGA system to a floating chamber to demonstrate the potential of the method to quantify the isotopic signature (δ13C and14C) of CO2lost by evasion (outgassing) from surface waters. The system, which was tested on a peatland stream in Scotland, involved 1) an initial period of scrubbing ambient CO2from the chamber, 2) a period of CO2build-up caused by surface water evasion, and 3) a final period of CO2collection by the molecular sieve cartridge. The field test at 2 different sites on the same drainage system suggested that the results were reproducible in terms of δ13C and14C values. These represent the first direct measurements of the isotopic signature of CO2lost by evasion from water surfaces.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Carbon Dioxide Capture Using a Zeolite Molecular Sieve Sampling System for Isotopic Studies (13C and 14C) of Respiration

              A method for collecting an isotopically representative sample of CO 2 from an air stream using a zeolite molecular sieve is described. A robust sampling system was designed and developed for use in the field that includes reusable molecular sieve cartridges, a lightweight pump, and a portable infrared gas analyzer (IRGA). The system was tested using international isotopic standards ( 13 C and 14 C). Results showed that CO 2 could be trapped and recovered for both δ 13 C and 14 C analysis by isotope ratio mass spectrometry (IRMS) and accelerator mass spectrometry (AMS), respectively, without any contamination, fractionation, or memory effect. The system was primarily designed for use in carbon isotope studies of ecosystem respiration, with potential for use in other applications that require CO 2 collection from air.
                Bookmark

                Author and article information

                Journal
                Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
                Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
                Elsevier BV
                0168583X
                April 2010
                April 2010
                : 268
                : 7-8
                : 931-934
                Article
                10.1016/j.nimb.2009.10.067
                349179d6-fa67-4361-914e-7f5c651bd5a2
                © 2010

                http://www.elsevier.com/tdm/userlicense/1.0/

                History

                Comments

                Comment on this article