Calibration Standards
Mostrando 13-24 de 57 artigos, teses e dissertações.
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13. Identification and quantification of sesquiterpenes and polyacetylenes in Atractylodes lancea from various geographical origins using GC-MS analysis
A convenient and sensitive GC-MS method was developed to identify thirteen sesquiterpenes and polyacetylenes (e.g. caryophyllene, γ-elemene, α-caryophyllene, β-selinene, isoledene, germacrene B, elixene, atractylone, hinesol, β-eudesmol, atrctylodin, atractylenolide II and acetylatractylodinol) in Atractylodes lancea (Thunb.) DC., Asteraceae. Among those
Rev. bras. farmacogn.. Publicado em: 17/04/2012
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14. Quantification of drugs with antimicrobial activity by high performance liquid chromatography coupled to mass spectrometry (LC-MS/MS): application in studies of comparative pharmacokinetics. / QuantificaÃÃo de fÃrmacos com atividade antimicrobiana em plasma humano por cromatografia lÃquida de alta eficiÃncia acoplada à espectrometria de massa (LC-MS/MS): aplicaÃÃo em estudos de farmacocinÃtica comparada
Two robust, fast and sensitive methods for quantification of sulfamethoxazole (SMX), trimethoprim (TMP) and sulfadiazine (SDZ) in plasma using high performance liquid chromatography coupled to mass spectrometry (LC-MS/MS) was developed and validated. The methods involved liquid-liquid extraction with ethyl acetate using metoprolol and sulfamethoxazole as int
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/10/2011
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15. Extração induzida por quebra de emulsão: uma nova estratégia para determinação de metais traços em amostras de óleo / Extração induzida por quebra de emulsão: uma nova estratégia para determinação de metais traços em amostras de óleo / Extraction induced by emulsion breaking: a new strategy for the trace metals determination oil sample / Extraction induced by emulsion breaking: a new strategy for the trace metals determination oil sample
The present work reports the development of a novel methodology for the determination of trace metals in organic liquids. The method is based on the extraction induced by emulsion breaking, which is carried out with the formation of a stable emulsion between the oil (10 mL) and an aqueous phase (2 mL) containing a surfactant and acid. After that, the emulsio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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16. DEVELOPMENT OF A METHOD FOR MULTIELEMENTAL DETERMINATION IN BIODIESEL BY ICP-MS / DESENVOLVIMENTO DE MÉTODO PARA DETERMINAÇÃO MULTIELEMENTAR EM BIODIESEL POR ICP-MS
Biodiesel appeared in this scenario as an alternative short-term, compatible with the current technologies and without the necessity of major modifications. The elements of greatest interest are the residue of catalyst of the production process (Na, K), those limited by environmental regulations (S) and those that act like poisons for the catalyst system of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2011
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17. DESIGN &DEVELOPMENT OF A STANDARD FOR HIGH VOLTAGE IN DIRECT CURRENT IN THE RANGE OF 1 KV TO 50 KV / PROJETO &DESENVOLVIMENTO DE UM PADRÃO PARA ALTA TENSÃO EM CORRENTE CONTÍNUA NA FAIXA DE 1 KV A 50 KV
Metrologia e qualidade estão intimamente relacionadas e constituem-se em poderoso instrumento de transformação da infraestrutura tecnológica de países e organizações. O avanço do desenvolvimento científico e tecnológico está fortemente embasado no avanço da metrologia. O Instituto Nacional de Metrologia, Normalização e Qualidade industrial (INM
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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18. Desenvolvimento de estratégias analíticas usando espectrometria de absorção atômica para avaliar a composição de copos de liga peltre e lixiviação de cádmio, chumbo e antimônio
In this work it was developed different analytical methods using atomic absorption spectrometry (AAS). Firstly, it was developed a method for the sequential determination of antimony and lead, in pewter sample, using high resolution continuum source flame AAS. The results showed that samples contain lead. This affirmation goes against manufacturer which says
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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19. Metodologia de controle de qualidade e implantação de campos padrões de radiação X, nível mamografia, seguindo a norma IEC 61267 / Quality control methodology and implementation of X-radiation standards beams, mammography level, following the standard IEC 61267
In this work it was developed and applied a quality control program of the Xradiation system (160 kV, constant potential, target of tungsten) of the Calibration Laboratory of IPEN(LCI) in the energy range relative to mammography beams (from 25 kV to 35 kV). The X radiation standards beams, level mammography, using molybdenum and aluminum as additional filtra
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/11/2010
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20. Estabelecimento de um novo método de calibração de câmaras de ionização tipo lápis para dosimetria em feixes de tomografia computadorizada / Establishment of a new calibration method of pencil ionization chamber for dosimetry in computed tomography
Pencil ionization chambers are used for beam dosimetry in computed tomography equipment (CT). In this study, a new calibration methodology was established, in order to make the Calibration Laboratory of Instituto de Pesquisas Energéticas e Nucleares (LCI) suitable to international metrological standards, dealing with specific procedures for calibration of t
Publicado em: 2010
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21. Análise de compostos sulfurados em efluentes gasosos de refinaria de petróleo
This work discusses an analytical procedure for analysis of sulfur compounds in treated petroleum refinery gaseous effluents using a sulfur chemiluminescence detector with dual plasma burner (SCD-DP). Calibration was accomplished by using standards and gaseous streams of known concentration of sulfur compounds. The response factors agree with the calibration
Química Nova. Publicado em: 2010
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22. Desenvolvimento de métodos analíticos para determinação de terras raras, Th, U e Y em rochas, solos e sedimentos por ICP-MS
In this work, the introduction of dissolved geological certified reference materials in the plasma through pneumatic (PN) and ultrasonic (USN) nebulizers was studied, in order to compare both nebulizers performances in connection to the determination of rare earth elements (REE), U, Th and Y in geological samples by inductively coupled plasma mass spectromet
Publicado em: 2010
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23. DETERMINATION OF TOTAL AS IN OCEANIC WATER BY HG AFS / DETERMINAÇÃO DE AS TOTAL EM ÁGUAS OCEÂNICAS POR HG AFS
The increase in industrial activity has increased human exposure to metals and metalloids exponentially. In this context, arsenium is a good example, being increasingly found in several natural environments. It is an element with no essential biological function, and possessed of elevated toxicity. The discharge of toxic elements in aquatic bodies can promot
Publicado em: 2010
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24. Emprego da técnica de emissão por fluorescência de ultravioleta no monitoramento de inibidores de corrosão em água produzida / Use of ultraviolet fluorescence emission in the monitoring of corrosion inhibitor in produced water
In order to increase the volume of oil extraction, solve and prevent problems in oil production, several chemical products are used. Corrosion inhibitors are the main chemical products used in the whole oil production chain, whose objective is to protect the system from deterioration caused by corrosion. The quaternary ammonium salts are the kind of inhibito
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/07/2009