TY - JOUR T1 - Single step Production of graphite from organic Samples for Radiocarbon Measurements JF - Radiocarbon Y1 - 2019 A1 - Elder, K L A1 - Roberts, M L A1 - Walther, T A1 - Xu, L KW - graphite KW - radiocarbon KW - sealed tube graphite KW - single step graphite AB - We present a new low-cost, high-throughput method for converting many types of organic carbon samples into graphite for radiocarbon (14C) measurements by accelerator mass spectrometry (AMS). The method combines sample combustion and reduction to graphite into a single procedure. In the Single Step method, solid samples are placed directly into Pyrex containing zinc, titanium hydride and iron catalyst. The tube is evacuated, flame sealed, and placed in a muffle furnace for 7 hr. A variety of organic samples have been tested including oxalic acid, sucrose, wood, peat, collagen, humic acid, and contamination swipe samples. The method significantly reduces the time required to produce a graphite sample for 14C measurement, with analytical precision and accuracy approaching that of traditional two-step combustion and hydrogen reduction methods. The details and applicability of the method are presented. VL - 61 UR - https://www.cambridge.org/core/product/identifier/S003382221900136X/type/journal_articlehttps://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003382221900136X IS - 6 ER -