Selecting the appropriate pretreatment plan depends on the unique attributes of the sample itself, such as the sample type, potential contaminants, the burial context, and the size and preservation of the sample. The goal of sample pretreatment is to isolate the carbon fraction required for radiocarbon dating and to remove carbon fractions that are altered or contaminated. Contaminants are carbon-containing materials that are not indigenous to the original organic material being dated. In general, it should be assumed that all samples are affected by some form of alteration or contamination.
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