Search Results - "Camoes, M. F."

Measurement of pH. Definition, standards, and procedures (IUPAC Recommendations 2002) by Buck, R. P., Rondinini, S., Covington, A. K., Baucke, F. G. K., Brett, Christopher M. A., Camoes, M. F., Milton, M. J. T., Mussini, T., Naumann, R., Pratt, K. W., Spitzer, P., Wilson, G. S.

“…The definition of a “primary method of measurement ” has permitted a full consideration of the definition of primary standards for pH, determined by a primary…”
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Surface Changes at Platinized Platinum Based Hydrogen Gas Electrodes Following Use in Highly Saline Aqueous Solutions by Camões, M. F., Anes, B., Oliveira, C. S., Jorge, M. E. Melo

“…Platinized platinum based hydrogen gas electrodes, Pt(Pt)|H2(g)|H+(aq), and silver‐silver chloride electrodes, Ag|AgCl|Cl− (aq), make up the Harned cell,…”
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pH of seawater by Marion, G.M., Millero, F.J., Camões, M.F., Spitzer, P., Feistel, R., Chen, C.-T.A.

“…An important property of aqueous solutions is pH because it affects chemical and biochemical properties such as chemical reactions, equilibrium conditions, and…”
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Ionic composition of seawaters and derived saline solutions determined by ion chromatography and its relation to other water quality parameters by Gros, Nataša, Camões, M.F., Oliveira, Cristina, Silva, M.C.R.

“…Ion chromatography (IC) presents new possibilities for assessing information about environmental samples, namely waters of various compositions, ranging from…”
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Validation of atmospheric aerosols parallel sampling in a multifold device by Oliveira, C. M, Camões, M. F, Bigus, P, Fachado, A. A, Silva, R. B

“…In this work, particulate matter was collected using an active sampling system consisting of a PM₁₀(<10 μm) inlet coupled to a multifold device containing six…”
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Detailed uncertainty budget for major and minor ions in stock combined calibration standards—Influence of impurities in chemicals by Gros, Nataša, Camões, M.F., da Silva, Ricardo J.N. Bettencourt

“…A general methodology for a systematic evaluation of the uncertainty was derived for each particular ion in stock combined calibration standards in which…”
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Nitrous oxide content and fluxes in Setúbal Bay, Portugal, during upwelling events by Goncalves, C, Brogueira, MJ, Camoes, M F

“…To evaluate the influence of upwelling events on nitrous oxide (N2O) levels and sea-air exchange in Setúbal Bay (SW Portugal), measurements of dissolved N2O…”
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Uncertainty Budget for Simultaneous Determination of Minor and Major Ions in Seawater with Ion Chromatography Confronted with Uncertainties in Concentrations of Calibration Standards by Gros, Nataša, Camões, M. F., Bettencourt da Silva, Ricardo J. N.

“…This work deals with the development and application of the detailed uncertainty budget for simultaneous determination of minor and major ions in seawater and…”
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A new terminology for the approaches to the quantification of the measurement uncertainty by DA SILVA, Ricardo J. N. B, SANTOS, Julia R, CAMOES, M. F. G. F. C

“…A new terminology for the approaches to the quantification of the measurement uncertainty is presented, with a view to a better understanding of the available…”
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Carotenoid stability in fruits, vegetables and working standards – Effect of storage temperature and time by Dias, M. Graça, Camões, M. Filomena G.F.C., Oliveira, Luísa

“…•The freezing and storage effects (−20 and −70°C) on carotenoids in food were evaluated through a HPLC method.•Carotenoids in food matrices did not show…”
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Development of metrological models for internal standard single-point and multi-point calibrations for the assessment of tear gas weapons compliance with legislation by Silveira, Daniel M., Salgueiro, Pedro A. S., Camões, M. Filomena G. F. C., Bettencourt da Silva, Ricardo J. N.

“…Tear gases are the most widely used non-lethal weapons, both by security forces and by the general public. The pepper spray, whose active agent is capsaicin,…”
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Solubility and osmotic coefficient of phthalic acid aqueous solutions from isopiestic measurements by Viçoso, C., Lito, M.J., Camões, M.F.

“…Solubility values reported in the literature for phthalic acid in water, at 25 °C, range from 0.0418 mol kg −1 to 0.08548 mol dm −3. A correct value was…”
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Evaluation of the sampling procedure adopted by the EU pesticide residue control programme to assess consumer exposure to high acute toxicity pesticides: Methamidophos in sweet peppers by BETTENCOURT DA SILVA, Ricardo J. N, LINO, Maria Joao, RIBEIRO SANTOS, Julia, CAMOES, M. Filomena G. F. C

“…Food chemical control, particularly control involving the analysis of pesticide residues in fruits and vegetables, is routinely performed on composite samples…”
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Optimization of the determination of chemical oxygen demand in wastewaters by Silva, Alexandra M.E. Viana da, Silva, Ricardo J.N. Bettencourt da, Camões, M. Filomena G.F.C.

“…Variation of the percentage contribution, P j , of the major uncertainty components, of the measurement expanded uncertainty ( U) and of the target measurement…”
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Pollutant materials and pollution control at Cupertino de Miranda Foundation by A. I. Mosca, M. F. Camões, L. E. Casanovas

“…Dr. António Cupertino de Miranda Foundation is the owner of a toy automobile, trains and boats collection, mainly constituted of zinc alloy (zamac).The…”
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Estimation of precision and efficiency mass transfer steps for the determination of pesticides in vegetables aiming at the expression of results with reliable uncertainty by da Silva, R J, Lino, M J, Santos, J R, Camões, M F

“…A 'bottom-up' approach for the expression of results obtained from analytical methods that include analytical steps with recovery inherently different from…”
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Validation, Uncertainty, and Quality Control of Qualitative Analysis of Tear Gas Weapons by Gas Chromatography-Mass Spectrometry by Bettencourt da Silva, Ricardo J. N., Silveira, Daniel M., Camões, M. Filomena G. F. C., Borges, Carlos M. F., Salgueiro, Pedro A. S.

“…The reliability of the identification/examination of compounds by gas chromatography hyphenated with mass spectrometry (GC-MS) can be significantly affected by…”
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Uncertainty estimation and in-house method validation of HPLC analysis of carotenoids for food composition data production by Dias, M. Graça, Camões, M. Filomena G.F.C., Oliveira, Luísa

“…The method for separation and quantitative determination of the main carotenoids in food by high-performance liquid chromatography (HPLC) was in-house…”
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Effect of different experimental parameters on the potentiometric evaluation of blood electrolytes using K+ as a test cation by Oliveira, C M, Rebelo, M J, Camões, M F

“…Potentiometric evaluation of ionic concentrations in physiological media has been reported to be significantly affected by the albumin containing matrix…”
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Analysis of organophosphorus, organochlorine and pyrethroid insecticides in medicinal plants by NUNES, M. J, CAMOES, M. F, FOURNIER, J

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