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一、选择测年材料的一般标准最适宜进行放射性碳素年代测定的样品是炭和木头那样含碳丰富的材料。其它有机质,诸如泥灰和湖泥也可应用。贝壳和骨头含有生物生长所必需的钙质碳酸盐,虽可用于年代测定,然而由于污染问题(见下),蛋白质骨胶通常需要从骨头中分离才能进行测试。同样地,如果样品足够的话,蜗壳蛋白质可以从贝壳中提取出来而进行年代测定。其它为考古学所关注的材料,包括炭泥、陶瓷碎片和陶瓷制品以及石器上的血液残留物,尽管尚处于试验
First, the general criteria for selecting dating materials Most suitable for dating the radiocarbon dating is carbon and wood-rich carbon-rich materials. Other organic matter, such as marl and lake mud, are also useful. Shells and bones, which contain the calcium carbonate necessary for biological growth, can be used for dating, however, due to contamination problems (see below), protein gels often require separation from bone to be tested. Likewise, the volute proteins can be extracted from the shells and chronologically determined if the sample is sufficient. Other materials of concern to archeology include charcoal, ceramic shards, and ceramic products, as well as blood residues on stone tools, though still under test