What is carbon 14 dating
Background samples usually consist of geological samples of infinite age such as coal, lignite, limestone, ancient carbonate, athracite, marble or swamp wood.
Many of the date ranges provided are actually two date ranges, for example the Habakkuk Commentary (#13), which is given as 160-148 or 111-2 CE.In an earlier section we mentioned that the limit of the technique is about 55-60 000 years.Obviously, the limit of the method differs between laboratories dependent upon the extent to which background levels of radioactivity can be reduced.Obviously, this activity is additional and must be removed from calculations.In order to make allowances for background counts and to evaluate the limits of detection, materials which radiocarbon specialists can be fairly sure contain no activity are measured under identical counting conditions as normal samples.
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The ratio of the activity of sucrose with 0.95 Ox was first measured by Polach at 1.50070.0052 (Polach, 1976b:122).