title: Gross alpha and beta activity and annual committed effective dose due to natural radionuclides in some water spinach (ipomoea aquatica Forssk) samples in Ho Chi Minh City, Vietnam.
abstract: The results of gross alpha and beta radioactivity measurement in water spinach samples from some districts in Ho Chi Minh City, Vietnam are presented in this paper. The measurements were performed using a low-background proportional counters LB4200 manufactured by Canberra Company, Inc. Mean concentrations of gross alpha and beta activity were found to be 1.50 ± 0.38 Bq kg-1to 84.25 ± 8.67 Bq kg-1. In order to keep the recommended dose level, a recommended maximum intake of water spinach was proposed to be 6 kg fresh per year. The total annual committed effective dose due to natural radionuclides in water spinach samples was then found in range from 0.07 mSv y-1to 0.82 mSv y-1. The dose from 26.32% of samples exceeds the exemption mean dose criterion of 0.3 mSv y-1but complies with the upper dose principle of 1 mSv y-1provided in UNSCEAR 2008 report. The estimated soil-to-plant transfer factors for gross alpha and beta for water spinach samples were also presented.
authors: Nuclear Technique Laboratory, VNUHCM-University of Science, Vietnam; Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, Vietnam. Electronic address: lchao@hcmus.edu.vn.
authors: Hao Cong
authors: HC
authors: Le
authors: Nuclear Technique Laboratory, VNUHCM-University of Science, Vietnam.
authors: Thang Van
authors: TV
authors: Nguyen
authors: Nuclear Technique Laboratory, VNUHCM-University of Science, Vietnam.
authors: Thu Nguyen Phong
authors: TNP
authors: Huynh
authors: Nuclear Technique Laboratory, VNUHCM-University of Science, Vietnam; Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, Vietnam.
authors: Phuong Truc
authors: PT
authors: Huynh
mesh_terms: D027741:Ipomoea / Q000737:chemistry*; D011834:Radiation Monitoring; D014744:Vietnam; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive
keywords: Annual committed effective dose; Gross alpha activity; Gross beta activity; Ipomoea aquatic; Low-background proportional counters LB4200; Soil-to-plant transfer factors