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The enigma of aluminum deposition in bone tissue from a patient with chronic ki...
Meira,Rodrigo Dias de; Carbonara,Cinthia Esbrile Moraes; Quadros,Kélcia Rosana da Silva; Santos,Carolina Urbini dos; Schincariol,PatríciaABSTRACT About four decades ago, the relationship between dialysis-dementia and aluminum (Al) began to be established. The restriction of drugs containing Al and improvements on water quality used for dialysis resulted in the clinical disappearance of Al intoxication. However, high prevalence of Al deposition in bone tissue from Brazilian dialysis patients is still being detected. Through the case report of a p...
Espectrometria de absorção atômica com atomização eletrotérmica em filamento de...
Ribeiro,Anderson Schwingel; Arruda,Marco Aurélio Zezzi; Cadore,SolangeIn this review it is presented some aspects of electrothermal atomic absorption spectrometry with tungsten coil (ETAW-AAS) since its beginning until the present days as well as the perspectives for this technique. Some aspects concerning its development and theoretical concepts are discussed. The analytical figures of merit such as limit of detection (LD), characteristic mass (m0), relative standard deviation (...
Emprego da amostragem de suspensão na determinação de Cu e Zn em lapa antártica...
Alves,Flávia de Lima; Jardim,Wilson de Figueiredo; Cadore,Solange; Arruda,Marco Aurélio Zezzi; Smichowski,Patricia; Marrero,JulietaIn order to demonstrate the feasibility of slurry sampling for environmental studies, different methodologies were developed for Cu and Zn in antarctic limpets and Ni in river sediment with FAAS detection. Studies focusing particle size, acid concentration, slurry stability, selectivity, among others were carried out in order to define the better conditions for slurry analysis. A study related to the depth prof...
Amostragem de suspensões: Emprego da técnica na análise direta de amostras
Magalhães,Carlos Emanuel de Carvalho; Arruda,Marco Aurélio ZezziThis review presents some characteristics related to slurry sampling in trace analysis in terms of its advantages, limitations and applications, as well as the latest advance in this area, such as mechanization, chemical modifiers, stabilization agents and others. The reviewed applications include foods, biological and geological materials.
Mecanização no preparo de amostras por microondas: o estado da arte
Arruda,Marco Aurélio Zezzi; Santelli,Ricardo ErthalThis review presents the latest advances of the mechanisation in sample preparation using microwave oven. The fundamental principles of microwaves field interaction with matter are presented, followed by the basic principles of microwave equipment construction. Hyphenation of microwave oven with flow injection analysis or robotic are discussed as well as some metodological difficulties and solutions by its impl...