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| Format: | Artículo científico |
| Language: | en |
| Published: |
Sociedade Brasileira de Proteção Radiológica - SBPR
2019
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| Online Access: | https://www.redalyc.org/articulo.oa?id=722280838096 |
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Table of Contents:
- 222Rn Determination in Water and Brine Samples Using Liquid Scintillation Spectrometry Thiago César Oliveira Roberto Pellacani Guedes Monteiro Rubens Martins Moreira Arno Heeren de Oliveira Biología LSC Radon Water samples Brine samples Liquid scintillation spectrometry (LSC) is the most common technique used for 222Rn determination in environmental aqueous sample. In this study, the performance of water-miscible (Ultima Gold AB) and immiscible (Optiscint) liquid scintillation cocktails has been compared for water and brine samples. 241Am, 90Sr and 226Ra standard solutions were used for LSC calibration. 214Po region was defined as better for both cocktails. Counting efficiency of 76 % and optimum PSA level of 95 for Ultima Gold AB cocktail, and counting efficiency of 82 % and optimum PSA level of 85 for Optiscint cocktail were obtained. Both cocktails showed similar results when applied for determining 222Rn activity in water and brine samples. However, the Optiscint is recommended due to its quenching resistance. Limit of detection of 0.08 and 0.06 Bq l−1 were obtained for water samples using a sample:cocktail ratio of 10:12 mL for Ultima Gold AB (UGAB) and Optiscint (OPSC) cocktails, respectively. Limit of detection of 0.08 and 0.04 Bq l−1 were obtained for brine samples using a sample:cocktail ratio of 8:12 mL for Ultima Gold AB and Optiscint cocktails, respectively. 2019 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280838096 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.7