The European Deforestation Regulation 2023/1115 (EUDR) prohibits trading of wood and wood products obtained from illegal logging on the EU market. While the identification of solid wood via anatomy, chemistry and genetics has already been established, there is a lack of identification methods for pulp and paper that complement anatomy. This publication presents a newly developed chemotaxonomic method for identifying mixed tropical hardwood (MTH) species in pulp and paper products based on their extractives analyzed with thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS). The measured data was processed and compared to identify marker substances and was then merged into a fingerprint database for identifying MTH species in paper of unknown composition. As database references, fully bleached kraft pulps were produced from 38 anatomically identified wood samples and then cryo-ball milled and extracted successively with n-hexane and acetone. The results show that the remaining wood extractives generated from bleached pulps are specific enough to find chemical relevant marker substances to detect MTH species. As chemical composition and anatomy are independent characteristics of wood, this paper makes a completely independent method available, which potentially improves the screening for Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) protected species.

中文翻译：

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纸张中热带木材物种的鉴定：基于提取物的新化学分类学方法

欧洲毁林法规 2023/1115 (EUDR) 禁止在欧盟市场上交易非法采伐获得的木材和木制品。虽然通过解剖学、化学和遗传学鉴定实木的方法已经建立，但纸浆和纸张缺乏补充解剖学的鉴定方法。该出版物提出了一种新开发的化学分类学方法，用于根据热脱附-气相色谱-质谱 (TD-GC-MS) 分析的提取物来识别纸浆和纸产品中的混合热带硬木 (MTH) 物种。对测量的数据进行处理和比较，以识别标记物质，然后合并到指纹数据库中，用于识别未知成分纸张中的 MTH 物种。作为数据库参考，完全漂白的牛皮纸浆是由 38 个经解剖鉴定的木材样品生产而成，然后依次进行低温球磨和提取n-己烷和丙酮。结果表明，从漂白纸浆中产生的剩余木材提取物具有足够的特异性，可以找到化学相关的标记物质来检测 MTH 物种。由于化学成分和解剖学是木材的独立特征，本文提供了一种完全独立的方法，这有可能改善濒危野生动植物种国际贸易公约（CITES）保护物种的筛选。