Beta Analytic is one of the fastest AMS laboratories in the world. The Miami- based lab has provided C14 dating since Stable isotope analysis is now one.
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Samples must be dried, clearly identified and packed in plastic or glass vials , or enveloped in aluminium foil or plastic bags Ziploc type. Avoid packaging the samples in paper or other organic material.
C14 Dating Techniques
Join the form s with your package of samples. Please contact us to get the plastic vials used in our counter the transfer of the samples and capping into these vials can also be done by us at the lab. The samples must be dried. Compact the samples as much as you can in the vial and, if possible, try to get a similar height of sample for every vial. Each sample must be weighed with a precision of 0. If you want us to transfer and cap the samples into the plastic vials, please make sure that the samples reach us dried and properly identified.
The samples must be packed in plastic vials or plastic bags Ziploc type. Join it with your batch of samples from your core. They must be finely crushed and homogenized. These steps drying, crushing and homogenization can be done by the customer himself, or by our people at the laboratory, for a little fee per sample.
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Plastic or glass vials are preferred over Ziploc-style bags. Join the form with your samples. For the custom declaration, you can write "Samples for scientific analysis, with no commercial value". You will be contacted via e-mail when your samples reach us at the laboratory.
Submitters from outside Laval University will receive a bill to the address they provided on the dating form after they get their results. Submitters from Laval University must fill the internal service form , then send it to the unit from where the bill be paid. Your department administration will then send the PO number to us at the laboratory before we can proceed with the analyses. Contact : Guillaume Labrecque.
What's new? The Pb and Cs datation service is also offered for sediments. The graphite produced is pressed into a target for AMS measurement.
Chemical processes are involved in this step. The counting in a particle accelerator, which involves specialized nuclear physics.
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After the samples are received and labelled, we proceed with their chemical pre-treatments. The next step is combustion, which produces carbon dioxyde CO 2. CO 2 is then purified into a vacuum system.
However, in addition to the recognized statistical limitations, the absolute accuracy of radio-carbon dating is limited by the past 14 C variations. Coupled with the requirements of proper association and pretreatment of samples is the long-term need to establish an overall correlation between radiocarbon and calendar years.
RADIOCARBON LABORATORY
At present this is still a matter for final agreement by the laboratories concerned. Meanwhile, when all possible steps have been taken to ensure the reliability of the date messurements, these can strictly only be compared with one another in terms of radiocarbon years bp. In practice this is often too restrictive but any attempts at calibration must be regarded as approximations for the time being. In this article the lower and upper case notation advocated in Antiquity 46 , , for radiocarbon and calendar years respectively has been followed.
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- Laboratory description.
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