The (super 14) C ages obtained on charcoal were, in most of the cases, in agreement with the humin fraction considering the experimental errors, or 20% older in average.
The dates obtained from total SOM showed significantly younger ages than the humin fraction indicating contamination by younger carbon.
Now, when I did that, I made a pretty big assumption, and some you all have touched on this in the comments on You Tube on the last video, is how do I know that this estimate I made is based on the assumption that the amount of carbon-14 in the atmosphere would have been roughly constant from when this bone was living to now?
And so the question is, is the amount of carbon-14 in the atmosphere and in the water, and in living plants and animals, is it constant?
Although little-feted, GNS's Rafter Radiocarbon laboratory in Lower Hutt was among the world's first to use radioactive decay to unravel history. Prior runs the half of the laboratory that cleans and distils samples down to pure elemental carbon, or graphite.
Down the hall is her husband Albert Zondervan's domain – the hulking m machine that splits the carbon into its stable and radioactive forms.
Careful sample preparation by Strata Data is matched by the world class analysis by Beta Analytic Inc.
Converting the results of the analyses to numerical ages is achieved using the INTCAL13 calibration curve.
It's that radioactive form of carbon – known as C14 – that is the key to discovering whether a carved ivory sculpture is an antiquity or a modern sham feeding poachers' coffers; whether a water bore is sucking dry an age-old aquifer or tapping a renewable store; whether a picture frame predates the painting in it. Poznan Radiocarbon Laboratory is the first such institution in the Central-Eastern Europe.Performance of the Poznan Radiocarbon Laboratory (PRL) is possible due to a close collaboration with the AMS Laboratory (LAMS), housed at the same floor, and leaded by the same person.These results show the humin fraction is considered a reliable material for (super 14) C dating in soils.However, the humin fraction ages could be assumed as the minimum ages for carbon in soils.