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Larger samples are welcome and in some cases, for homogeneity reasons, may be more appropriate.All radiocarbon measurements are performed at the SUERC AMS facility using either the 5 MV or 250 k V NEC accelerator mass spectrometers.The pretreatment methods that we mainly focus on are used to remove contaminant carbon from a range of sample types or to isolate a particular chemical fraction from a sample prior to combustion/hydrolysis, graphitization, and subsequent AMS 14C measurement.The methods described are for bone (collagen extraction, with and without ultrafiltration), cremated bone, tooth enamel, charcoal, grain, carbon residues, shell, wood (including alpha-cellulose isolation), peat, sediments, textiles, fuel/biofuel, and forensic samples.
View the full list Radiocarbon dating has transformed our understanding of the past 50,000 years.The Radiocarbon WEB-info site has a comprehensive section on pre-treatment methods and the reasons for using the different methods.A typical sample for AMS dating would contain 1-2 mg of carbon (the weight of raw sample material depends on the sample type (see below), although we do prepare smaller samples).collagen, silk, wool, leather and should be able to remove low-molecular and high molecular weight HSs.In this study bone collagen was hot acid hydrolyzed to amino acids and nanofiltrated.
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The total mass of the isotope is indicated by the numerical superscript.