Analytical and sampling constraints of 210pb dating erodating ru

28-Apr-2016 02:38

Understanding your project and ensuring samples are submitted in the proper manner helps to ensure the success of your project.Where is the best location to collect a core from a lake? Do you have any recommendations on the resolution of sectioning the core? Do you have any requirements for sample submission? Do you have any preference in sample packing/transportation How many samples will you analyze for Pb-210 for each core? What are the analytical methods and detection limits for each radioisotope analysis? Can I get a preliminary report before all analyses are completed? Will there be any other charges in addition to the analyses? Can I send just a few samples for radioisotope analyses instead of dating a core?Please let us know if you have any questions concerning the measurement or calculation of the dry bulk density. Alternatively, you can send us every second section, including the surface section and the bottom section.If you are going to send discontinuous sections for dating, we recommend that you confirm with us about choosing samples before you send them to us.the sample is well homogenized before subsampling, especially for the watery samples.If you are going to send us dry sediment samples and request data modeling and interpretation, we will need dry bulk density data (dry wt./wet volume) from you in order to perform Pb-210 modeling. We prefer to receive all sections from you and select the most important samples for analyses to obtain reliable dating results.

Below are answers to some of the questions most frequently asked by our clients.We recommend, however, that you contact us before sample submission.The isotope activities will usually be highest and most easily measured at this site, and physical and biological mixing may be reduced, particularly if the deep waters are anoxic. We recommend collecting a core that is long enough to contain sediments more than 160 years old at the bottom, or taking the core as deep as you can get.Do you have any recommendations on the resolution of sectioning the core (i.e. The resolution of core sections depends upon the sediment accumulation rate at the sampling site.Typically, the core is sectioned at 1-cm thickness in the upper 20 cm, 2-cm thickness between 20 and 40 cm and 5-cm thickness below 40 cm depth. If the samples will be submitted wet, we will measure the dry bulk density of the sediment (dry wt./wet volume) before the sediments are dried and analyzed for Pb-210.

Below are answers to some of the questions most frequently asked by our clients.

We recommend, however, that you contact us before sample submission.

The isotope activities will usually be highest and most easily measured at this site, and physical and biological mixing may be reduced, particularly if the deep waters are anoxic. We recommend collecting a core that is long enough to contain sediments more than 160 years old at the bottom, or taking the core as deep as you can get.

Do you have any recommendations on the resolution of sectioning the core (i.e. The resolution of core sections depends upon the sediment accumulation rate at the sampling site.

Typically, the core is sectioned at 1-cm thickness in the upper 20 cm, 2-cm thickness between 20 and 40 cm and 5-cm thickness below 40 cm depth. If the samples will be submitted wet, we will measure the dry bulk density of the sediment (dry wt./wet volume) before the sediments are dried and analyzed for Pb-210.

If the sediment accumulation rate is very low (e.g. If you are going to send us wet sub-samples, please avoid any water loss and make sure each sub-sample is representative, i.e.