Metrology In Chemical
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. DESENVOLVIMENTO DE UMA TÉCNICA ULTRASSÔNICA PARA AVALIAR TEORES DE ÓLEO E GRAXA EM EFLUENTES DE BIOCOMBUSTÍVEIS
Ultrasound as a metrology tool has many applications in health care, industrial, and chemical analyses. Ultrasonic techniques are rapid, low-cost, non-invasive, and highly repeatable. Although ultrasound can be used to measure emulsions, no effort had been made thus far to optimize its sensitivity for metrological analysis. In this work, a technique for anal
Quím. Nova. Publicado em: 2015-12
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2. VALIDATION OF METHODS FOR WDXRF AND OES-SPARK TECHNIQUES IN STEEL ANALYSIS. DETERMINATION OF THE UNCERTAINTY OF MEASUREMENTS FOR API STEEL PLANT SAMPLE / Validação de métodos para as técnicas de WDXRF e OES -spark, na análise de aços. Cálculo de incerteza de medição para amostras de processo, aço classe API
The increase of gas and petroleum demanding in the national and international markets, the specification and certification of the chemical analysis results of gas and oil pipe-line have became more and more challenging. A continuous development has been outlined to improve API grade alloy steels (American Petroleum Institute). The steel properties depend on
Publicado em: 2009
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3. Estudo de organização em rede na metrologia em química / STUDY ON NETWORK ORGANIZATION IN CHEMICAL METROLOGY
This research is focused on identifying the benefits and to increase the amount of understanding associated with operation and performance of a network system focusing on chemical metrology. Its development comprised the identification of factors of influence and dimensions of improvement. The experimental research was conducted through a multiple case study
Publicado em: 2007
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4. Establishment of operationally parameters, proficiency test implementation and analytical methods using in animal nutrition critical evaluation / Estabelecimento de parâmetros operacionais, implementação de ensaio de proficiência e avaliação crítica de métodos analíticos empregados em nutrição animal
Proficiency Testing for Animal Nutrition Laboratories was implemented with the objective to evaluate the variability of the analytical results and the performance of Brazilian animal nutrition laboratories. The structure and normalization were planning in accordance with analytical laboratories international protocols. Three years results are reported and di
Publicado em: 2007
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5. PREPARATION, CARACTERIZATION AND CERTIFICATION OF URANIUM ISOTOPE REFERENCE MATERIALS / "Preparação, caracterização e certificação de materiais de referência isotópicos de urânio"
This work describes the preparation, characterization and certification of a set of uranium isotope reference materials ranging from 0.5 to 20.0 % of 235U in mass. The most important concepts of metrology in chemical measurements were applied so that the certified quantities in these materials could be directly traceable to the International System of Units
Publicado em: 2006
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6. MEDIÇÃO DE VAZÃO DE GÁS NATURAL POR PLACA DE ORIFÍCIO. AVALIAÇÃO METROLÓGICA E IMPACTOS ECONÔMICOS / METROLOGICAL ANALYSIS ON THE ECONOMICAL IMPACT OF REAL TIME FLUID PROPERTY CORRECTION IN NATURAL GAS FLOW MEASUREMENT ON THE TRANSPORTATION PIPELINES
This study presents a metrological analysis focused on the natural gas flow and volume measurement by orifice plate measurement systems. It takes into account the determination of chemical and physical properties and the application of these parameters in the flow and volume measurement. The study also considers aspects related to the electronic sampling of
Publicado em: 2005
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7. ANALYSIS OF THE UNCERTAINTIES OF THE QUANTITATIVE PHASE ANALYSIS BY X-RAY POWDER DIFFRACTION BASED ON THE RIETVELD METHOD / ANÁLISE DAS INCERTEZAS DA QUANTIFICAÇÃO DE FASE PELO MÉTODO DE RIETVELD EM ANÁLISE DE PÓ POR DIFRAÇÃO DE RAIOS X
The analysis of measurement systems is done by the examination of the adequacy of the system according to the operator, the instrument and other sources of variability, as well as by the comparison of the measurement error variance with the natural process variance. This research consisted in the evaluation of the uncertainties of phase quantification in pow
Publicado em: 2005
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8. CONFIABILIDADE METROLÓGICA DO LABORATÓRIO ANTIDOPING DO JOCKEY CLUB BRASILEIRO. ESTUDO DE CASO: VALIDAÇÃO DE MÉTODO ANALÍTICO PARA DETERMINAÇÃO DE CAFEÍNA EM URINA DE CAVALOS DE CORRIDA / METROLOGICAL RELIABILITY OF THE ANTIDOPING LABORATORY OF THE BRAZILIAN JOCKEY CLUB. STUDY CASE: VALIDATION OF ANALYTICAL METHOD FOR DETERMINATION OF CAFFEINE IN URINE OF RACE HORSES
A presente pesquisa de mestrado relaciona-se ao desenvolvimento e à validação de um método analítico para detecção de substâncias proibidas em matrizes biológicas de cavalos de corrida e seu impacto na confiabilidade metrológica de serviços laboratoriais voltados à atividade turfística visando (i) a especificação de desempenho de um laboratór
Publicado em: 2004
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9. STATISTICAL METHODOLOGY FOR ANALYTICAL METHODS VALIDATION APPLICABLE CHEMISTRY METROLOGY / METODOLOGIA ESTATÍSTICA PARA VALIDAÇÃO DE MÉTODOS ANALÍTICOS APLICÁVEL À METROLOGIA EM QUÍMICA
The use of statistical methodology for analytical methods validation is vital to assure that measurements have the quality level required by the goal to be attained. This thesis describes a statistical modelling approach for combining four different aspects of validation: checking the linearity of the calibration curve and compute the detection and the quant
Publicado em: 2003
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10. METROLOGICAL EVALUATION OF OPTICAL EMITTERS AND DETECTORS APPLIED TO THE CHARACTERIZATION OF ATMOSPHERIC PARTICULATES POLLUTANTS / AVALIAÇÃO METROLÓGICA DE EMISSORES E DETECTORES ÓPTICOS APLICADOS À CARACTERIZAÇÃO DE POLUENTES PARTICULADOS ATMOSFÉRICOS
The atmospheric pollution is a latent world-wide problem, and it is harmful to the health, visibility and climate. For these factors, several studies and researches have been developed to characterize the chemical composition of the pollutants, concentration, size of particles, etc, with the objective of constructing adjusted instruments for the control of t
Publicado em: 2003