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Radiological assessment of pharmaceutical clays

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Abstract

The suitability for pharmaceutical and cosmetic application of fourteen clay samples, eight raw and six commercialized samples, from Minas Gerais and São Paulo states, Brazil, were evaluated and their mineralogy, chemical and radiological composition were determined. Results indicated that the samples are composed mainly of quartz, kaolinite and feldspar, enriched in Al2O3 and TiO2, Cd, Cs, Sb, Se, Th, and U and depleted in SiO2, MgO, P2O5, and Ca. Concentrations found are unlikely to present any harm in topical applications, and all the radiological parameters were below the global average or the established limits.

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Authors and Affiliations

  1. Research Reactor Center, Energy and Nuclear Research Institute (Instituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes 2242, Cidade Universitária, São Paulo, CEP 05508 000, Brazil

    Paulo Sergio Cardoso da Silva, Marcelo Francis Máduar, Marcos Antonio Scapin, Rafael Henrique Lazzari Garcia & João Paulo Machado Martins

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  1. Paulo Sergio Cardoso da Silva
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  2. Marcelo Francis Máduar
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  3. Marcos Antonio Scapin
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  4. Rafael Henrique Lazzari Garcia
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  5. João Paulo Machado Martins
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Correspondence to Paulo Sergio Cardoso da Silva.

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da Silva, P.S.C., Máduar, M.F., Scapin, M.A. et al. Radiological assessment of pharmaceutical clays. J Radioanal Nucl Chem 307, 2035–2046 (2016). https://doi.org/10.1007/s10967-015-4404-y

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