RADIOCARBON DATING OF ASIAN LACQUERS: MOLECULAR CHARACTERIZATION AND ASSESSMENT OF A PRETREATMENT METHOD PRIOR TO ACCELERATOR MASS SPECTROMETRY

IF 2 3区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Radiocarbon Pub Date : 2023-11-09 DOI:10.1017/rdc.2023.90

M Wojcieszak, J Veenhoven, T Van den Brande, S Saverwyns, F Lynen, M Boudin

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引用次数: 0

Abstract

ABSTRACT Lacquerwork technologies comprise multiple techniques depending on countries, time, and traditions. Carved Asian lacquers applied on wooden objects consist of multiple thin uncolored or pigmented layers spread over the surface. To radiocarbon ( 14 C) date these types of objects, often only the wooden structure is used. Here we report on a set of carved lacquered objects that were dated based on stylistic form, 14 C dating of the wooden structure and of the Asian lacquers. THM-Py-GC-MS and micro-Raman spectroscopy were used to confirm the molecular composition of the lacquers and helped assessing the pretreatment protocol. The lacquers analyzed contained between 20 and 50% wt carbon, thus 2–5 mg of sample were necessary for 14 C dating. The dates obtained on wood and lacquers showed a reliable correlation. The results suggest that, in most cases, it is sufficient to sample a part of the lacquer layers to date an object. We advise to perform an acid pretreatment followed by a successive solvent immersion with an increasing polarity. Dating different components of a lacquered object can also help to understand previous restoration interventions that frequently occur for ancient lacquered objects. Ceramic, metallic, and other objects covered with Asian lacquers can also be dated using this approach.

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亚洲漆的放射性碳定年:分子表征和加速器质谱前预处理方法的评估

漆器技术包括多种技术，取决于国家，时间和传统。木制品上的亚洲雕花漆是由多个薄的、未上色或着色的层铺在表面组成的。要用放射性碳(14c)测定这类物体的年代，通常只使用木制结构。在这里，我们报告了一组雕刻的漆器，这些漆器是根据风格形式，木结构和亚洲漆器的14c年代确定的。利用THM-Py-GC-MS和微拉曼光谱确定了漆的分子组成，并有助于评估预处理方案。所分析的漆含有20%至50%的wt碳，因此需要2-5毫克的样品进行14c测年。从木材和漆上得到的日期显示出可靠的相关性。结果表明，在大多数情况下，取样一部分漆层就足以确定一个物体的年代。我们建议进行酸预处理，然后连续溶剂浸泡，极性增加。确定一个漆器的不同组成部分的年代也可以帮助了解以前经常发生在古代漆器上的修复干预措施。陶瓷、金属和其他被亚洲漆覆盖的物体也可以用这种方法来确定年代。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiocarbon 地学-地球化学与地球物理

CiteScore

16.20

自引率

6.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Radiocarbon serves as the leading international journal for technical and interpretive articles, date lists, and advancements in 14C and other radioisotopes relevant to archaeological, geophysical, oceanographic, and related dating methods. Established in 1959, it has published numerous seminal works and hosts the triennial International Radiocarbon Conference proceedings. The journal also features occasional special issues. Submissions encompass regular articles such as research reports, technical descriptions, and date lists, along with comments, letters to the editor, book reviews, and laboratory lists.