Radiocarbon dating sample size
The second is a set of new samples that the RATE team collected and sent to a leading radiocarbon AMS laboratory to be dated.
In both cases, I am convinced that the “intrinsic radiocarbon” is nothing more than contamination and instrument background.
Thus, even if larger samples like RATE’s “on the order of 100 mg”  are submitted to an AMS laboratory, only about 1 mg of carbon will actually undergo analysis.
Though Baumgardner calls a 1 mg sample “tiny” , it is generally considered “large” by AMS laboratories [e.g., 5, 7, 8], with enough carbon to provide ion source current for about a day.
Muller suggested that particle accelerators be used to separate the atoms, allowing the radiocarbon atoms to be counted directly instead of waiting for them to decay.
It was hoped that this would enable dating of much smaller and perhaps much older samples.
The RATE team claims the results have yielded convincing and irrefutable scientific evidence of a young earth.
Most laboratories prefer to receive samples larger than 1 mg to allow some loss in cleaning and to have additional material available if needed.
Modern radiocarbon dating by AMS is a complex process with numerous potential sources of contamination requiring characterization.
The technique arises from radiocarbon being continually produced in the upper atmosphere by cosmic rays while it is continually decaying, so the atmospheric concentration has reached a fairly steady equilibrium.
Plants are in equilibrium with atmospheric radiocarbon through respiration.
This equilibrium continues through plants to herbivores and through them to carnivores.