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However, as with any dating technique there are limits to the kinds of things that can be satisfactorily dated, levels of precision and accuracy, age range constraints, and different levels of susceptibility to contamination.Radiocarbon dating is especially good for determining the age of sites occupied within the last 26,000 years or so (but has the potential for sites over 50,000), can be used on carbon-based materials (organic or inorganic), and can be accurate to within ±30-50 years.Radiocarbon dating of bone collagen is challenging because its preservation is influenced by many environmental factors, including temperature, moisture, p H, and microbial activity.Bone organic matter could be altered physically and chemically through absorbing dissolved organic carbon and "fusing" humic substances with collagen compounds through humification processes.The application of Accelerator Mass Spectrometry (AMS) for radiocarbon dating in the late 1970s was also a major achievement.Compared to conventional radiocarbon techniques such as Libby's solid carbon counting, the gas counting method popular in the mid-1950s, or liquid scintillation (LS) counting, AMS permitted the dating of much smaller sized samples with even greater precision.

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To completely remove molecular contaminants is cumbersome and expensive.

An improved method for radiocarbon dating fossil bones.

Radiocarbon dating of bone and shell from their organic componenets.

Improved collagen extraction method by modified Longin method.

Influence of diet on the distribution of nitrogen isotopes in animals.

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