Search Results - "CAMOES, M. Filomena G. F. C"

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  1. 1

    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

    Published in Food chemistry (01-08-2014)
    “…•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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    Journal Article
  2. 2

    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.

    Published in Accreditation and quality assurance (01-04-2012)
    “…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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    Journal Article
  3. 3

    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

    Published in Accreditation and quality assurance (01-05-2002)
    “…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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    Conference Proceeding Journal Article
  4. 4

    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.

    Published in Analytica chimica acta (12-08-2011)
    “…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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    Journal Article
  5. 5

    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.

    Published in Analytical letters (22-01-2014)
    “…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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    Journal Article
  6. 6

    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

    Published in Food chemistry (15-08-2008)
    “…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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    Journal Article
  7. 7

    Assessment of the determination of water-soluble ionic composition of atmospheric aerosols from the analysis of crossed halves of filters by Bettencourt da Silva, Ricardo J. N., Arias, Alejandro, Oliveira, Cristina M. R. R., Camões, M. Filomena G. F. C.

    Published in Accreditation and quality assurance (01-04-2012)
    “…The water-soluble ionic composition of atmospheric aerosols is a key parameter for estimating its anthropogenic or natural origin. This evaluation depends on…”
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    Journal Article
  8. 8

    Quantification of analytes affected by relevant interfering signals under quality controlled conditions by da Silva, Ricardo J.N. Bettencourt, Santos, Júlia R., Camões, M. Filomena G.F.C.

    Published in Analytica chimica acta (31-05-2006)
    “…The analysis of organic contaminants or residues in biological samples is frequently affected by the presence of compounds producing interfering instrumental…”
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    Journal Article
  9. 9

    Designing valid and optimised standard addition calibrations: Application to the determination of anions in seawater by Rodrigues, Joana, da Silva, Ricardo J.N. Bettencourt, Camões, M. Filomena G.F.C., Oliveira, Cristina M.

    Published in Talanta (Oxford) (01-09-2015)
    “…A strategy for designing valid standard addition calibrations and for optimising their uncertainty is presented. The design of calibrations involves the…”
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    Journal Article
  10. 10

    Weighted calibration with reduced number of signals by weighing factor modelling: Application to the identification of explosives by ion chromatography by Brasil, Beatriz, Bettencourt da Silva, Ricardo J.N., Camões, M. Filomena G.F.C., Salgueiro, Pedro A.S.

    Published in Analytica chimica acta (04-12-2013)
    “…•Reliable linear weighted calibrations, based in reduced number of signal, are performed.•Simplification of weighted calibrations is based in prior models of…”
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    Journal Article
  11. 11

    Evaluation of the performance of the determination of anions in the water soluble fraction of atmospheric aerosols by Arias, Alejandro, Bettencourt da Silva, Ricardo J.N., Camões, M.Filomena G.F.C., Oliveira, Cristina M.R.R.

    Published in Talanta (Oxford) (30-01-2013)
    “…The knowledge of the mass of particulate matter in air, its chemical composition and emission sources is of relevance for taking decisions concerning air…”
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    Journal Article
  12. 12

    Critical assessment of three high performance liquid chromatography analytical methods for food carotenoid quantification by Dias, M. Graça, Oliveira, Luísa, Camões, M. Filomena G.F.C., Nunes, Baltazar, Versloot, Pieter, Hulshof, Paul J.M.

    Published in Journal of Chromatography A (21-05-2010)
    “…Three sets of extraction/saponification/HPLC conditions for food carotenoid quantification were technically and economically compared. Samples were analysed…”
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    Journal Article
  13. 13

    Carotenoids in traditional Portuguese fruits and vegetables by Dias, M. Graça, Camões, M. Filomena G.F.C., Oliveira, Luísa

    Published in Food chemistry (01-04-2009)
    “…Carotenoids, α-carotene, β-carotene, β-cryptoxanthin, lycopene, lutein and zeaxanthin, were determined in 10 varieties of five fruit species (orange, pear,…”
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    Journal Article
  14. 14

    Evaluation of the analytical method performance for incurred samples by Bettencourt da Silva, Ricardo J.N., Santos, Júlia R., Camões, M.Filomena G.F.C.

    Published in Analytica chimica acta (06-06-2003)
    “…A methodology for the evaluation of the performance of an analytical method for incurred samples is presented. Since this methodology is based on…”
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    Journal Article
  15. 15

    Reassessment of pH reference values with improved methodology for the evaluation of ionic strength by Lito, M.J. Guiomar H.M., Camões, M. Filomena G.F.C.

    Published in Analytica chimica acta (21-02-2005)
    “…The conflict between pH as empirical number in routine control and the pH value regarded as conveying some information concerning the effective concentration…”
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    Journal Article
  16. 16

    Evaluation of sample processing and sub-sampling performance by Bettencourt da Silva, Ricardo J.N, Figueiredo, Helena, Santos, Júlia R, Camões, M.Filomena G.F.C

    Published in Analytica chimica acta (03-02-2003)
    “…A methodology for the estimation of sample processing and sub-sampling performance based on the comparison of the global method experimental dispersion of…”
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    Journal Article
  17. 17

    Effect of citrate impurities on the reference pH value of potassium dihydrogen buffer solution by Lito, M.J.Guiomar H.M, Camões, M.Filomena G.F.C, Covington, A.K

    Published in Analytica chimica acta (10-04-2003)
    “…Solutions of potassium dihydrogen citrate, KH 2C 6H 5O 7, exhibit reference pH values close to those of the primary standard pH buffer solutions of tartrate…”
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    Journal Article
  18. 18

    Validation of the uncertainty evaluation for the determination of metals in solid samples by atomic spectrometry by BETTENCOURT DA SILVA, R. J. N, CAMOES, M. F. G. F. C, SEABRA E BARROS, J

    Published in Accreditation and quality assurance (01-04-1998)
    “…Every analytical result should be expressed with some indication of its quality. The uncertainty as defined by Eurachem ("parameter associated with the result…”
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    Conference Proceeding Journal Article