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Posted by / 18-Oct-2017 23:14

Radiocarbon dating service

Physical and chemical pretreatments vary depending on the type of material and the depositional environment from which it came.It is important to understand the nature of the material being dated as certain organic fractions are more appropriate than others, depending on the environment.For fully trained outside users processing samples at the AEL-AMS laboratory, a 20% discount will be applied at the discretion of AEL-AMS staff.For Ottawa-Carleton Geoscience Centre (OCGC) users, the OCGC discounted rate will be applied with no further discounts for quantity.Please visually inspect your samples and remove any rootlets or other signs of physical contamination.Our chemical pretreatment methods will remove post-depositional carbonates as well as humic acids.

If shipping macrofossils, we recommend they be rinsed in deionised, distilled or ultra-pure (Milli-Q) water to remove residual sediment.Macrofossils include charcoal, wood, plant, bone, shell, and seeds – not rootlets.We recommend isolating macrofossils with tweezers or by sieving in distilled, deionized water. Macrofossils (except shell) will undergo the standard AAA pretreatment.Charcoal samples should be picked out, floated, or sieved from any accompanying sediment.Prior to shipping, please dry charcoal samples for 12-24 hours at temperatures not greater than 70°C.

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  2. [tags: UPS, bank of america, transportation] - Human space exploration had its beginning on October 4, 1957, when the Soviets launched Sputnik 1 into space. The United States followed close behind, launching Explorer 1 into orbit in early 1958.