Direct measurements of small 14C samples after oxidation in quartz tubes

被引：19
作者：
Fahrni, S. M. [2 ,3 ]
Gaeggeler, H. W. [2 ,3 ]
Hajdas, I. [1 ]
Ruff, M. [2 ,3 ]
Szidat, S. [2 ]
Wacker, L. [1 ]
机构：
[1] ETH, Zurich, Switzerland
[2] Univ Bern, Dept Chem & Biochem, Bern, Switzerland
[3] Paul Scherrer Inst, Lab Radiochem & Environm Chem, Villigen, Switzerland
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2010年 / 268卷 / 7-8期
关键词：
Laboratory procedures; Sample preparation; Mass spectrometry including SIMS; multiphoton ionization and resonance; ionization mass spectrometry; MALDI; RADIOCARBON C-14; AMS; FACILITY;
D O I：
10.1016/j.nimb.2009.10.031
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Small C-14 samples gain importance in environmental research and for dating purposes. However, throughput of such samples is limited by the preparation of graphite targets for accelerator mass spectrometry (AMS) measurements. In our approach, oxidation of samples with copper oxide in quartz tubes was applied to form CO2 which was measured directly with the gas ion source of the small AMS facility MICADAS. The presented method was designed to meet the requirements for fast and easy handling of small samples (<100 mu g carbon). As combustion byproducts are likely to interfere with ionisation processes in the gas ion source, we additionally investigated the effects of several gases on C- currents. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：787 / 789
页数：3
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