The analysis of processing standards alongside samples for quality assurance in radiocarbon (14C) analyses is critical. Ideally, these standards should be similar both in nature and age to unknown samples. A new compound-specific approach was developed at the University of Bristol for dating pottery vessels using palmitic and stearic fatty acids extracted from within the clay matrix and isolated by preparative capillary gas chromatography. Obtaining suitable potsherds for use as processing standards in such analyses is not feasible, so we suggest that bog butter represents an ideal material for such purposes. We sampled ca. 450 g from two bog butter specimens and homogenized them by melting. We verified the homogeneity of both specimens by characterization of their lipid composition, δ13C values of individual lipids, and both bulk- and compound-specific radiocarbon analyses on 10 sub-samples of each bog butter specimen. The weighted means of all 14C measurements on the bog butter standards are 3777 ± 4 BP (IB33) and 338 ± 3 BP (IB38), thereby providing age-relevant standards for archaeological and historical fatty acids and ensuring the accuracy of radiocarbon determinations of lipids using a compound-specific approach. These new secondary standards will be subjected to an intercomparison exercise to provide robust consensus values.

中文翻译：

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产生两种新的放射性碳标准，用于对来自 BOG 黄油发现的脂肪酸进行化合物特异性放射性碳分析

分析处理标准和样品以保证放射性碳的质量（14C) 分析很关键。理想情况下，这些标准在性质和年龄上都应该与未知样品相似。布里斯托大学开发了一种新的化合物特异性方法，用于使用从粘土基质中提取并通过制备毛细管气相色谱分离的棕榈酸和硬脂脂肪酸对陶器进行测年。在此类分析中获得合适的陶片作为加工标准是不可行的，因此我们建议沼泽黄油是用于此类目的的理想材料。我们采样了约。从两个沼泽黄油样品中提取 450 克，并通过熔化使其均质化。我们通过表征它们的脂质成分 δ 来验证两个样本的同质性13单个脂质的 C 值，以及对每个沼泽黄油样本的 10 个子样本进行的体积特异性和化合物特异性放射性碳分析。所有的加权平均值14沼泽黄油标准品的 C 测量值为 3777 ± 4 BP (IB33) 和 338 ± 3 BP (IB38)，从而为考古和历史脂肪酸提供与年龄相关的标准，并确保使用化合物特异性放射性碳测定脂质的准确性方法。这些新的二级标准将进行相互比较，以提供强大的共识值。