Dating or xian

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Many commercial laboratories have different charges for dating depending on the precision (and speed) that is required.

A high-precision date may involve the lab in more intensive pretreatment and labour and consequently costs are higher.

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This is particularly relevant for laboratories which use conventional methods of dating.

A number of variables feature in this consideration, one of the most important concerns the environment within which the sample was deposited.

The lab must consider the possibility of contamination in each sample it dates and depends upon information supplied by the submitter and collector of the material for its assessment.

The submitter should supply information detailing the type of environment from which the sample was obtained and commenting on the presence of rootlet intrusion and contaminants.

There is more information about AMS Sample Preparation and pretreatment at the Oxford AMS lab and the Rafter Radiocarbon Lab.

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