Due to matrix interference and sample particle size effects, some of the most important and difficult issues in laser‐induced breakdown spectroscopy (LIBS) analysis are the calibration and quantitative measurement of a complex matrix. This study proposes the use of borate fusion as an alternative sample preparation procedure for the quantitative measurement of Al, Fe, Si and Ti in bauxite by LIBS. Analytical calibration curves were made using bauxite certified reference materials (CRM), and the precision and accuracy of the methods were evaluated by analysing an additional bauxite CRM, using two different approaches: pressed powder pellets and fused glass beads. The borate fusion method was the most suitable sample preparation technique, since particle size effects and matrix interference could be minimised, obtaining better linearity on the analytical calibration curves (r2), and more accurate and more precise results for bauxite analysis.
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A percepção de desastres por comunidades afetadas tem ganhado espaço enquanto estratégia de envolvimento local para redução de riscos de desastres. Considerados atores-chave para estimular a resiliência em comunidades escolares, os participantes desta pesquisa foram as(os) professoras(es) da rede pública do Litoral Norte paulista. A partir da aplicação de um questionário, foi possível identificar que, além de valorizar o envolvimento de múltiplos atores e a fixação de compromissos compartilhados para prevenir os desastres, as(os) professoras(es) podem favorecer a integração da escola no ciclo das políticas de gestão de riscos de desastres, processo que depende de mais oportunidades que valorizem seu papel no desenvolvimento da resiliência comunitária.
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