Preparation of bones for radiocarbon (14C) dating is still quite a challenge for researchers. The methods are being tested and improved, to increase reliability of dating results and to verify the previous ones. In this work, a set of gelatine samples, extracted from Cervus elaphus and Cervus canadensis bones from various sites in Europe and a set of human bones from archaeological sites in Poland were subjected to retreatment using ultrafiltration in Gliwice Radiocarbon Laboratory. The tested samples represent a wide range of ages, from older than 40,000 14C years BP to modern. The prepared material was subjected to the measurement of C/N atomic ratios and 14C dating using the accelerator mass spectrometry (AMS) technique. Also, the stable isotopes (δ13C and δ15N) values were determined. In a few cases ultrafiltration allows to improve gelatine quality for long-stored samples, by increasing the %C and %N as well as decreasing C/Nat ratios. Nevertheless, this effect was not observed for majority of the samples. Remeasurements of long-term stored samples give mostly the same 14C ages for ultrafiltered ones and for those without ultrafiltration.

对于研究人员来说，准备用于放射性碳（ 14 ​​C）测年的骨骼仍然是一个相当大的挑战。这些方法正在接受测试和改进，以提高测年结果的可靠性并验证以前的结果。在这项工作中，从欧洲不同地点的马鹿和加拿大鹿骨头中提取的一组明胶样本以及来自波兰考古遗址的一组人类骨骼在格利维采放射性碳实验室中使用超滤进行了再处理。测试的样本代表了广泛的年龄范围，从距今14世纪 40,000 多年前到现代。使用加速器质谱（AMS）技术对制备的材料进行C/N原子比和14 C测年的测量。另外，还确定了稳定同位素（δ 13 C 和δ 15 N）值。在某些情况下，超滤可以通过增加 %C 和 %N 以及降低 C/N 比率来提高长期储存样品的明胶质量。然而，大多数样品并未观察到这种效应。对长期储存的样品进行重新测量，对于超滤样品和未超滤样品的14 C 年龄基本相同。