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Comparison of beta (LSC) and gamma (HPGe) spectrometric methods for lead-210 in chronological study

Geochronometria
Volume 45 (2018): Issue 1 (January 2018)
By:
Open Access
|Jan 2018

Figures & Tables

Fig. 1

Study sites: Lake Karackiai, Lithuania (I) and Lake Rajgrod Poland (II).
Study sites: Lake Karackiai, Lithuania (I) and Lake Rajgrod Poland (II).

Fig. 2

Scheme of 210Pb separation procedure
Scheme of 210Pb separation procedure

Fig. 3

Distribution of the total 210Pb measured by two methods versus core depth of Lake Karackiai (Lithuania).
Distribution of the total 210Pb measured by two methods versus core depth of Lake Karackiai (Lithuania).

Fig. 4

Distribution of the total 210Pb measured by two methods versus core depth of Lake Rajgrod (Poland).
Distribution of the total 210Pb measured by two methods versus core depth of Lake Rajgrod (Poland).

Fig. 5

Distribution of the 210Pb excess versus core depth for Lake Karackiai (Lithuania).
Distribution of the 210Pb excess versus core depth for Lake Karackiai (Lithuania).

Fig. 6

Distribution of the 210Pb excess versus core depth for Lake Rajgrod (Poland).
Distribution of the 210Pb excess versus core depth for Lake Rajgrod (Poland).

Fig. 7

CRS model 210Pb dates versus depth for Lake Karackiai core. There are also shown 137Cs activity changes versus depth and dates derived from 210Pb CRS model.
CRS model 210Pb dates versus depth for Lake Karackiai core. There are also shown 137Cs activity changes versus depth and dates derived from 210Pb CRS model.

Fig. 8

CRS model 210Pb dates versus depth for Lake Rajgrod core. There are also shown 137Cs activity changes versus depth and dates derived from 210Pb CRS model.
CRS model 210Pb dates versus depth for Lake Rajgrod core. There are also shown 137Cs activity changes versus depth and dates derived from 210Pb CRS model.

Sediment mass accumulation and sedimentations rates (mean values) based on 210Pbex evaluated by gamma and beta methods_

CoreMass accumulation rate (g/cm2/yr)Sedimentation rate (cm/yr)
gamma methodgamma methodbeta methodbeta method
Lake Karackiai0.0090.0080.140.12
Lake Rajgrod0.0600.0550.410.33

Comparison of investigated radiochemical procedures_

Procedure#1#2#3
Pb2+ carrierRadiochemical yield
72 ± 6%77 ± 4%76 ± 4%
Precipitates of PbSO4 dissolved inSolubility
2 ml 6M ammonium acetate2 ml 3M ammonium acetate2 ml 0.5M EDTA/NaOH
+++
18 ml scintillation cocktailOptiphase nisaie 3Homogeneity
PbSO4 in 2 ml 6M ammonium acetatePbSO4 in 2 ml 3M ammonium acetatePbSO4 in 2 ml 0.5M EDTA/NaOH
++–
210Pb tracerRadiochemical yield
70 ± 5%73 ± 8%70 ± 6%
DOI: https://doi.org/10.1515/geochr-2015-0084 | Journal eISSN: 1897-1695
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Language: English
Page range: 34 - 43
Submitted on: Jun 29, 2016
Accepted on: Nov 20, 2017
Published on: Jan 24, 2018
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 times per year
Keywords:
Pb,
Bi,
anion exchange resin,
liquid scintillation counting,
low-background gamma-ray spectrometry
Related subjects:
Geosciences,
Geosciences, other

© 2018 Renata Mikalauskienė, Jonas Mažeika, Rimantas Petrošius, Piotr Szwarczewski, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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