Hydropyrolysis as a new tool for radiocarbon pre-treatment and the quantification of black carbon
Hydropyrolysis as a new tool for radiocarbon pre-treatment and the quantification of black carbon
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DOI：
10.1016/j.quageo.2008.11.001
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发表时间：
2009-04-01
影响因子：
2.7
通讯作者：
Vane, C. H.
中科院分区：
文献类型：
--
作者：
Ascough, P. L.;Bird, M. I.;Vane, C. H.
报告了关于氢热解 (hypy) 作为量化和分离黑碳 (BC) 用于放射性碳分析的新工具的潜力的第一个结果。 BC 是一种高度稳定的碳形式，在生物质热解为木炭等材料的过程中产生。因此，这种成分的分离和定量在放射性碳测量中引起了极大的兴趣，特别是对于更古老的样品，其中污染问题变得更加严重。 Hypy 已被证明能够可靠地分离用于工程和地质应用的不稳定和难熔碳质样品成分，但其在 C-14 地质年代学研究中的潜力此前尚未被开发。在这里，我们使用精选的土壤标准样品和来自具有地质和考古意义的沉积物的古代木炭来测试炒作技术。结果表明，hypy 可以有效且可重复地分离各种样品类型中的不同碳组分，因此有可能为放射性碳分析提供快速而可靠的预处理技术。 Hypy 的另一个优点是可以定量收集从样品中去除的非 BC 部分以供后续进一步分析。该技术代表了一种有前途的新方法，不仅可以确保在放射性碳测年之前对热解碳样品进行可靠的净化，而且可以用于各种环境基质中的BC定量。 (c) 2008 Elsevier Ltd. 保留所有权利。
The first results concerning the potential of hydrogen pyrolysis (hypy) as a new tool for the quantification and isolation of Black Carbon (BC) for radiocarbon analysis are reported. BC is a highly stable form of carbon, produced during pyrolysis of biomass to materials such as charcoal. Isolation and quantification of this component is therefore of great interest in radiocarbon measurement, particularly for more ancient samples, where contamination issues become more critical. Hypy has been demonstrated to reliably separate labile and refractory carbonaceous sample components for engineering and geological applications, but its potential in C-14 geochronological investigation has previously been unexplored. Here, we test the hypy technique using a selection of soil standard samples and ancient charcoals from deposits of geological and archaeological significance. The results show that hypy can effectively and reproducibly isolate different carbon fractions within a variety of sample types and thus has the potential to provide a rapid and robust pre-treatment technique for radiocarbon analysis. Hypy has the additional advantage that the non-BC fraction removed from a sample can be quantitatively collected for subsequent further analysis. The technique represents a promising new approach not only for ensuring reliable decontamination of pyrogenic carbon samples prior to radiocarbon dating, but also for BC quantification in a variety of environmental matrices. (c) 2008 Elsevier Ltd. All rights reserved.