Radiocarbon dating of bone and shell from their organic componenets.

Improved collagen extraction method by modified Longin method.

Bone samples from the Fifth International Radiocarbon Intercomparison (VIRI) were used: VIRI-E (mammoth), -F (horse), -G (human), and -I (whale).

radiocarbon dating bone-32

8-10 weeks) with routine precision: £315 ( VAT) per sample for batches of up to 9 samples.

£305 ( VAT) per sample for batches of 10-39 samples.

What methods do they use and how do these methods work?

In this article, we will examine the methods by which scientists use radioactivity to determine the age of objects, most notably carbon-14 dating.

We present evidence to suggest that LMW fraction contaminants could be derived from the ultrafilters rather than humic substances.

Excessively long ultrafiltration time was suspected to have contaminated the bone samples with material from the ultrafilter, because those samples exhibited older C ages of unfiltered gelatin extracted from well-preserved bones can be sufficiently accurate, and that care should be taken not to contaminate bone gelatin during ultrafiltration.

Carbon-14 cannot be used to date biological artifacts of organisms that did not get their carbon dioxide from the air.

This rules out carbon dating for most aquatic organisms, because they often obtain at least some of their carbon from dissolved carbonate rock.

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

Chemical, enzymatic and spectroscopic characterizaton of "collagen" and other organic fractions from prehistoric bones.

­ ­You probably have seen or read news stories about fascinating ancient artifacts.