Carbon is considered a radioactive isotope of carbon. This process begins when an organism is no longer able to exchange Carbon with their environment. Some samples, like wood, already ceased interacting with the biosphere and have an apparent age at death and linking them to the age of the deposits around the sample would not be wholly accurate. Dating material from one location gives date information about the other location, and the dates are also used to place strata in the overall geological timeline. This effect is known as isotopic fractionation. Studying the material remains of past human life and activities may not seem important or exciting to the average Joe unlike the biological sciences.
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Journal of the Franklin Institute.
How Does Carbon Dating Work
Beta Analytic does not accept pharmaceutical samples with "tracer Carbon" or any other material containing artificial Carbon to eliminate the risk of cross-contamination. The ability to date minute samples using AMS has meant that palaeobotanists and palaeoclimatologists can use radiocarbon dating on pollen samples. Before the advent of radiocarbon dating, the fossilized trees had been dated by correlating sequences of annually deposited layers of sediment at Two Creeks with sequences in Scandinavia. Radiocarbon dating takes time, and laboratories often have waiting lists so this factor must be considered. Carbon is constantly be generated in the atmosphere and cycled through the carbon and nitrogen cycles. Samples for dating need to be converted into a form suitable for measuring the 14 C content; this can mean conversion to gaseous, liquid, or solid form, depending on the measurement technique to be used.