Leather has been produced by a variety of methods throughout human history, providing researchers unique insight into multiple facets of social and economic life in the past. Archaeologically recovered leather is often fragile and poorly preserved, leading to the use of various conservation and restoration efforts that may include the application of fats, oils, or waxes. Such additives introduce exogenous carbon to the leather, contaminating the specimen. These contaminants, in addition to those accumulated during interment, must be removed through chemical pretreatment prior to radiocarbon (14C) dating to ensure accurate dating. DirectAMS utilizes organic solvents, acid-base-acid (ABA) and gelatinization for all leather samples. Collagen yield from leather samples is variable due to the method of production and the quality of preservation. However, evaluating the acid-soluble collagen fraction, when available, provides the most accurate 14C dates for leather samples. In instances where gelatinization does not yield sufficient material, the resulting acid-insoluble fraction may be dated. Here we examine the effectiveness of the combined organic solvent and ABA pretreatment with gelatinization for leather samples, as well as the suitability of the acid-insoluble fraction for 14C dating.

中文翻译：

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酸溶性和酸不溶性皮革组分在放射性碳测年中的适用性

在整个人类历史中，皮革是通过多种方法生产的，为研究人员提供了对过去社会和经济生活多个方面的独特见解。考古回收的皮革通常易碎且保存不善，导致使用各种保护和修复工作，可能包括使用脂肪、油或蜡。此类添加剂会将外源碳引入皮革，从而污染样品。除了埋葬过程中积累的污染物外，这些污染物必须在放射性碳之前通过化学预处理去除（14C) 约会以确保准确约会。DirectAMS 对所有皮革样品使用有机溶剂、酸碱酸 (ABA) 和糊化。皮革样品的胶原蛋白产量因生产方法和保存质量而异。然而，评估酸溶性胶原蛋白组分（如果可用）可提供最准确的14C 皮革样品的日期。在糊化不能产生足够材料的情况下，所得的酸不溶性部分可能会过时。在这里，我们检查了结合有机溶剂和 ABA 预处理和糊化对皮革样品的有效性，以及酸不溶性部分对皮革样品的适用性。14C约会。