A previous study by Georgiadou et al. The analytical precision of the F 14 C measurements for human tissue samples is usually 0. A few tumour samples lack IRMS data due to insufficient amount of sample material. Tellus B 65 We find drying liquid samples in a lyophilizer using an oilless pump works well to minimize sample loss and keep fossil and contemporary backgrounds low. Carbon, the radioisotope of carbon, is naturally developed in trace amounts in the atmosphere and it can be detected in all living organisms. This is a PDF file of an unedited manuscript that has been accepted for publication.
However, with further refinement, involving extraction of cell types and components, there is a possibility that fundamental knowledge of tumour biology might still be gained by the bomb-pulse technique.
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