Activity levels of gamma-emitters in Brazil nuts

Armelin, M. J. A.

doi:10.15392/bjrs.v4i1.200

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…For Ra-224 in Brazil nut, Martins et al (2012) found (15.8 ± 3.2) Bq/kg and Parekh et al (2008) found (9.8 ± 1) Bq/kg. For Brazil nuts, the AC of radionuclides are comparable, and in agreement with the results from different localities of Brazil (Penna-Franca et al, 1968;Parekh et al, 2008;Martins et al, 2012;Armelin, 2016).…”

Section: Resultssupporting

confidence: 89%

“…The mean of AC for K-40 in Brazil nut found by Armelin (2016) was (225 ± 59) Bq/kg. For Ra-226 in Brazil nut, Armelin (2016) found (44 ± 14) Bq/kg, Martins et al (2012) found (104 ± 14) Bq/kg and Parekh et al (2008) found (23.0 ± 1.7) Bq/kg. For Ra-228 in Brazil nut, Armelin (2016) found (153 ± 51) Bq/kg, Martins et al (2012) found (99 ± 16) Bq/kg and Parekh et al (2008) found (24 ± 3) Bq/kg.…”

Section: Resultsmentioning

confidence: 87%

“…For Ra-226 in Brazil nut, Armelin (2016) found (44 ± 14) Bq/kg, Martins et al (2012) found (104 ± 14) Bq/kg and Parekh et al (2008) found (23.0 ± 1.7) Bq/kg. For Ra-228 in Brazil nut, Armelin (2016) found (153 ± 51) Bq/kg, Martins et al (2012) found (99 ± 16) Bq/kg and Parekh et al (2008) found (24 ± 3) Bq/kg. For Ra-224 in Brazil nut, Martins et al (2012) found (15.8 ± 3.2) Bq/kg and Parekh et al (2008) found (9.8 ± 1) Bq/kg.…”

Section: Resultsmentioning

confidence: 93%

“…Even some observations were made on the possibilities of people who consume a considerable amount of the nuts, during many years, building up elevated radium body burdens (Penna-Franca et al, 1968). The mean of AC for K-40 in Brazil nut found by Armelin (2016) was (225 ± 59) Bq/kg. For Ra-226 in Brazil nut, Armelin (2016) found (44 ± 14) Bq/kg, Martins et al (2012) found (104 ± 14) Bq/kg and Parekh et al (2008) found (23.0 ± 1.7) Bq/kg.…”

Section: Resultsmentioning

confidence: 99%

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Study of K-40, Ra-226, Ra-228 and Ra-224 activity concentrations in some seasoning and nuts obtained in Rio de Janeiro city, Brazil

et al. 2019

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Rio de Janeiro city is the second most populous city in Brazil with almost 7 million inhabitants, the local market offers a great diversity of foods, nuts and seasonings, national and imported. Seasonings are used worldwide, some have a common use as salt and sugar, besides others used locally as cheiro verde, a mixture of chives (Allium schoenoprasum) and parsley (Petroselinum crispum) used in Rio de Janeiro, Brazil. According to the Onternational Food Safety Authorities Network (2011), plants used as food commonly have K-40, Th-232 and U-238 and their progenies. On a variety of concentrations, naturally occurring radionuclides are present in every part of the earth and in the tissue of all living beings. Natural radionuclides can be found almost everywhere; in soil, water and atmosphere, subjecting human beings to a daily exposure. The K-40 is responsible for about 60% of the total annual effective dose due to ingestion (United Nations Scientific Committee on the Effects of Atomic Radiation, 2008). Therefore, it is a radionuclide of relevance both in the environmental point of view and radiological protection (Zhu, 2001). Gamma-ray spectrometry using high-purity germanium detectors (HPGe) is a procedure widely used for determining the concentrations of natural and artificial radionuclides in environmental samples. As a nondestructive technique, this method possesses advantages in multi-element analysis, simplified sample preparation (i.e., does not require any chemical separation process), and applicability for precise quantitative determination of the radioactive content in a sample. The most accurate method to determine the activity concentration of radionuclides is to use an adequate standard source with similar geometrical dimensions, density, and chemical compositions to the sample under study (Díaz & Vargas, 2008). This study aims to determine activities concentrations for the radionuclides K-40, Ra-226, Ra-228, Ra-224 in nuts and seasoning samples obtained in Rio de Janeiro City, Brazil, using a hyper pure germanium detector (HPGe) and the LabSDCS software for the calculation of self-absorption correction. 2 Materials and methods 2.1 Sample analyses The nuts and seasoning samples analyzed were acquired in informal street commerce of Rio de Janeiro city, Brazil. The samples analyzed are listed in Table 1, along with their botanical names and the physical characteristic in which they were analyzed.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

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Study of K-40, Ra-226, Ra-228 and Ra-224 activity concentrations in some seasoning and nuts obtained in Rio de Janeiro city, Brazil

et al. 2019

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The use of total diet study for determination of natural radionuclides in foods of a high background radiation area

Rosa

Maihara

Taddei

et al. 2022

Journal of Environmental Radioactivity

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An Experimental determination of activity concentrations (238U, 232Th, 40K, and 137Cs) in Brazil nut and Turkish hazelnut sold in the United Kingdom

PEKER

2023

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmanın amacı, gıdalarda bulunan Doğal Olarak Oluşan Radyoaktif Materyaller (NORM) ürünleri ve yapay radyoizotoplara ait aktivite konsantrasyonlarının belirlenmesidir ve incelenmek üzere gıda ürünlerinden Brezilya fındığı ile Türk fındığı seçilmiştir. Birleşik Krallık’ta faaliyet gösteren 4 farklı markadan satın alınan Brezilya fındığı ve Türk fındığı ürünlerindeki 238U, 232Th, 40K ve 137Cs radyoizotoplarının aktivite konsantrasyonları, gama-ışınlarının sayımını gerçekleştiren yüksek saflıktaki germanyum dedektörü (HPGe) ile belirlendi. Etik olarak, tüm markalar A, B, C ve D olarak kodlandı. Brezilya fındığı numunelerindeki 238U ve 232Th aktivite konsantrasyonları sırasıyla 33.9 ± 0.4 ↔ 35.5 ± 0.4 Bq/kg ve 19.0 ± 0.3 ↔ 31.3 ± 0.4 Bq/kg aralıklarında iken, Türk fındığı numunelerindeki 238U ve 232Th aktivite konsantrasyonları tespit edilebilen en düşük aktivitenin (MDA) altında kalmıştır. Tüm numuneler içinde, en baskın radyoaktivite kaynağı ise 220.0 ± 3.4 ↔ 242.0 ± 3.4 Bq/kg aktivite aralığındaki 40K olup, sadece D ve A markalarından satın alınan Türk fındığı numunelerinde sırasıyla 1.1 ± 0.2 ve 1.8 ± 0.1 Bq/kg aktivitelerine sahip 137Cs tespit edilmiştir.

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Activity levels of gamma-emitters in Brazil nuts

Cited by 3 publications

References 13 publications

Study of K-40, Ra-226, Ra-228 and Ra-224 activity concentrations in some seasoning and nuts obtained in Rio de Janeiro city, Brazil

Study of K-40, Ra-226, Ra-228 and Ra-224 activity concentrations in some seasoning and nuts obtained in Rio de Janeiro city, Brazil

The use of total diet study for determination of natural radionuclides in foods of a high background radiation area

An Experimental determination of activity concentrations (238U, 232Th, 40K, and 137Cs) in Brazil nut and Turkish hazelnut sold in the United Kingdom

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