MINIMUM DETECTABLE ACTIVITY CONCENTRATION IN DIRECT ALPHA SPECTROMETRY FROM OUTDOOR AIR SAMPLES: CONTINUOUS MONITORING VERSUS SEPARATE SAMPLING AND COUNTING

2006 ◽  
Vol 90 (2) ◽  
pp. 167-175 ◽  
Author(s):  
R P??ll??nen ◽  
T Siiskonen
Keyword(s):  
Alpha Spectrometry ◽  
Continuous Monitoring ◽  
Activity Concentration ◽  
Minimum Detectable Activity ◽  
Outdoor Air ◽  
Air Samples ◽  
Detectable Activity

scholarly journals Absence of Detectable Radionuclides in Breast Milk in Sendai, Japan in 2012 Even by High-Sensitivity Determination: Estimated Dose among Infants after the Fukushima Nuclear Disaster

2021 ◽  
Vol 18 (11) ◽  
pp. 5825
Author(s):  
Zhaoqing Lyu ◽  
Sani Rachman Soleman ◽  
Tomoko Fujitani ◽  
Yukiko Fujii ◽  
Manal A. M. Mahmoud ◽  
...  
Keyword(s):  
Breast Milk ◽  
High Sensitivity ◽  
Minimum Detectable Activity ◽  
Activity Level ◽  
Internal Exposure ◽  
Dietary Intakes ◽  
Detectable Activity ◽  
Nuclear Disaster ◽  
Exposure Limit ◽  
Fukushima Nuclear Disaster

The aim of this study was to estimate radionuclide levels in breast milk and the transferred dose to their infants in Sendai (100 km from Fukushima), Japan after the 2011 Fukushima nuclear disaster. Radionuclide concentrations were analyzed in 101 specimens of breast milk collected in 2012. Median values for minimum detectable activities were 0.39, 0.34, 1.1, 1.89, and 17.1 Bq/kg for 137Cs, 134Cs, 131I, 110mAg, and 40K, respectively. Only radionuclides from 40K were detected. To estimate potential exposure and radiocesium dose, we assumed that the samples contained each minimum detectable activity level. The mean minimum detectable activity concentrations (standard deviation) of 137Cs and 134Cs were 0.42 (0.15) and 0.37 (0.14) Bq/kg, respectively. Means of estimated dietary intakes of 137Cs and 134Cs among infants were 0.35 (0.12) and 0.31 (0.11) Bq/day, respectively. The committed effective doses of radiocesium in infants aged 3 and 12 months via breastmilk were estimated at 5.6 (2.1) and 3.3 (1.2) μSv/year, respectively. Dietary intakes of 137Cs and 134Cs in breastfeeding mothers were back-calculated at 1.9 (0.71) and 1.7 (0.65) Bq/day, respectively. The study verified no discernible exposure to radionuclides among infants. The most conservative estimates were below the Japanese internal exposure limit of 1 mSv/year.

scholarly journals Determination of SARS-CoV-2 RNA in different particulate matter size fractions of outdoor air samples in Madrid during the lockdown

2021 ◽  
Vol 195 ◽  
pp. 110863
Author(s):  
Beatriz Linillos-Pradillo ◽  
Lisa Rancan ◽  
Elías Díaz Ramiro ◽  
Elena Vara ◽  
Begoña Artíñano ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Outdoor Air ◽  
Air Samples ◽  
Size Fractions
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