List of works by José Barbosa

A comparative study of some hydroxyanthraquinones as acid-base indicators

scientific article published on 01 November 1985

A multiway approach for classification and characterization of rabbit liver apothioneins by CE-ESI-MS

scientific article published on 01 November 2008

Acid-base equilibria and assay of benzodiazepines in acetonitrile medium

scientific article published on 01 August 1989

Acid-base equilibria of beta-blockers in acetonitrile

scientific article published on 01 January 1990

Acid-base indicators in acetonitrile: Their pK values and chromatic parameters

scientific article published on 01 December 1988

An update for human blood plasma pretreatment for optimized recovery of low-molecular-mass peptides prior to CE–MS and SPE–CE–MS.

scientific article

Analysis of a peptide hormone mixture of therapeutic interest by liquid chromatography coupled to high-flow pneumatically assisted electrospray mass spectrometry

scientific article published on 01 September 2000

Analysis of human transferrin glycopeptides by capillary electrophoresis and capillary liquid chromatography-mass spectrometry. Application to diagnosis of alcohol dependence

scientific article published on 9 October 2013

Analysis of intact erythropoietin and novel erythropoiesis-stimulating protein by capillary electrophoresis-electrospray-ion trap mass spectrometry

scientific article published on 01 May 2008

Analysis of opioid peptides by on-line SPE-CE-ESI-MS.

scientific article

Analysis of quinolone residues in edible animal products.

scientific article

Analysis of recombinant human erythropoietin and novel erythropoiesis stimulating protein digests by immunoaffinity capillary electrophoresis-mass spectrometry

scientific article

Analysis of serum transthyretin by on-line immunoaffinity solid-phase extraction capillary electrophoresis mass spectrometry using magnetic beads

scientific article published on 10 March 2016

Analysis of transthyretin in human serum by capillary zone electrophoresis electrospray ionization time-of-flight mass spectrometry. Application to familial amyloidotic polyneuropathy type I

scientific article published on 01 June 2015

Anti-EPO and anti-NESP antibodies raised against synthetic peptides that reproduce the minimal amino acid sequence differences between EPO and NESP.

scientific article published on 30 May 2007

Assessment of capillary electrophoresis TOF MS for a confident identification of peptides ⬇️

scientific article published on August 1, 2010

CE-ESI-MS of biological anions in plastic capillaries at high pH

scientific article published on 01 March 2007

Capillary electrophoresis coupled to time of flight-mass spectrometry of therapeutic peptide hormones

scientific article published on 01 March 2003

Capillary electrophoresis/mass spectrometry for the separation and characterization of bovine Cu,Zn-superoxide dismutase.

scientific article

Characterization of human transferrin glycoforms by capillary electrophoresis and electrospray ionization mass spectrometry.

scientific article published in December 2003

Characterization of metallothionein isoforms from rabbit liver by liquid chromatography coupled to electrospray mass spectrometry

scientific article published on 01 November 2003

Characterization of superoxide dismutase 1 (SOD-1) by electrospray ionization-ion mobility mass spectrometry

scientific article published on 01 January 2013

Characterization of transferrin glycoforms in human serum by CE-UV and CE-ESI-MS

scientific article published on 01 June 2007

Classification of congenital disorders of glycosylation based on analysis of transferrin glycopeptides by capillary liquid chromatography-mass spectrometry

scientific article

Comparative study of the LC-MS/MS and UPLC-MS/MS for the multi-residue analysis of quinolones, penicillins and cephalosporins in cow milk, and validation according to the regulation 2002/657/EC

scientific article published on 20 July 2011

Comparison of capillary electrophoresis and capillary liquid chromatography coupled to mass spectrometry for the analysis of transthyretin in human serum

scientific article published on 24 March 2016

Comparison of off- and in-line solid-phase extraction for enhancing sensitivity in capillary electrophoresis using ochratoxin as a model compound

scientific article published on 28 February 2009

Comparison of sheathless and sheath-flow electrospray interfaces for the capillary electrophoresis-electrospray ionization-mass spectrometry analysis of peptides

scientific article published on 01 April 2005

Confirmatory and quantitative analysis using experimental design for the extraction and liquid chromatography-UV, liquid chromatography-mass spectrometry and liquid chromatography-mass spectrometry/mass spectrometry determination of quinolones in tu

scientific article published on 06 October 2006

Determination and characterization of diuretics in human urine by liquid chromatography coupled to pneumatically assisted electrospray ionization mass spectrometry

scientific article

Determination of a series of quinolones in pig plasma using solid-phase extraction and liquid chromatography coupled with mass spectrometric detection Application to pharmacokinetic studies

scientific article published on 10 October 2006

Determination of difloxacin and sarafloxacin in chicken muscle using solid-phase extraction and capillary electrophoresis

scientific article published in February 2002

Determination of fluoroquinolones in human urine by liquid chromatography coupled to pneumatically assisted electrospray ionization mass spectrometry

scientific article published in December 2003

Determination of human erythropoietin by on-line immunoaffinity capillary electrophoresis: a preliminary report

scientific article published on 30 January 2007

Determination of multiresidue quinolones regulated by the European Union in pig liver samples. High-resolution time-of-flight mass spectrometry versus tandem mass spectrometry detection

scientific article published on 4 June 2008

Determination of pK(a) values of some hydroxylated benzoic acids in methanol-water binary mixtures by LC methodology and potentiometry

scientific article

Determination of penicillins in milk using LC-UV, LC-MS and LC-MS/MS

scientific article published on 01 July 2009

Determination of phenolic acids in strawberry samples by means of fast liquid chromatography and multivariate curve resolution methods

scientific article published on 12 September 2006

Determination of quinolones in chicken tissues by liquid chromatography with ultraviolet absorbance detection.

scientific article published in March 2004

Development of analytical methods for multiresidue determination of quinolones in pig muscle samples by liquid chromatography with ultraviolet detection, liquid chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry

scientific article published on 20 December 2005

Dissociation constants and assay of weak bases in non-aqueous solvents

scientific article published on 01 January 1988

Effect of glycemic control on early diabetic renal lesions. A 5-year randomized controlled clinical trial of insulin-dependent diabetic kidney transplant recipients

scientific article published on 01 August 1994

Effective sorbents for solid-phase extraction in the analysis of quinolones in animal tissues by capillary electrophoresis

scientific article published on 01 January 2004

Electrophoretic behavior of peptides in capillary electrophoresis influence of ionic strength and pH in aqueous-organic media.

scientific article published in June 2001

Electrophoretic behaviour of quinolones in capillary electrophoresis. Effect of pH and evaluation of ionization constants.

scientific article published in April 1999

Equilibrium constants and assay of benzodiazepines in acetic acid

scientific article published on 01 April 1989

Estimation of the composition of recombinant human erythropoietin mixtures using capillary electrophoresis and multivariate calibration methods

article

Evaluation of chromatographic versus electrophoretic behaviour of a series of therapeutical peptide hormones

scientific article published on 01 January 2003

Evaluation of electrophoretic method versus chromatographic, potentiometric and absorptiometric methodologies for determing pK(a) values of quinolones in hydroorganic mixtures.

scientific article published in March 2001

Evaluation of migration behaviour of therapeutic peptide hormones in capillary electrophoresis using polybrene-coated capillaries.

scientific article published on 15 December 2009

Evaluation of non-immunoaffinity methods for isolation of cellular prion protein from bovine brain.

scientific article published on 23 January 2014

Evaluation of on-line solid phase extraction-capillary electrophoresis-electrospray-mass spectrometry for the analysis of neuropeptides in human plasma

scientific article published on 01 August 2008

Evaluation of the electrophoretic behaviour of opioid peptides Separation by capillary electrophoresis-electrospray ionization mass spectrometry.

scientific article

Glycoform characterization of erythropoietin combining glycan and intact protein analysis by capillary electrophoresis - electrospray - time-of-flight mass spectrometry

scientific article published on 01 July 2006

High resolution mass spectrometry in the identification of transformation products and metabolites from β-lactam antibiotics in thermally treated milk

scientific article published on 02 October 2014

High-resolution mass spectrometry applied to the identification of transformation products of quinolones from stability studies and new metabolites of enrofloxacin in chicken muscle tissues

scientific article

High-resolution mass spectrometry applied to the study of metabolome modifications in various chicken tissues after amoxicillin administration

scientific article published on 03 January 2014

Identification and characterization of isomeric N-glycans of human alfa-acid-glycoprotein by stable isotope labelling and ZIC-HILIC-MS in combination with exoglycosidase digestion.

scientific article published on 9 August 2016

Identification of bioactive peptides in a functional yogurt by micro liquid chromatography time-of-flight mass spectrometry assisted by retention time prediction

scientific article published on 08 January 2012

Identification of bioactive peptides in hypoallergenic infant milk formulas by CE-TOF-MS assisted by semiempirical model of electromigration behavior

article

Improved determination of quinolones in milk at their MRL levels using LC-UV, LC-FD, LC-MS and LC-MS/MS and validation in line with regulation 2002/657/EC.

scientific article published on 29 February 2008

Improved tryptic digestion assisted with an acid-labile anionic surfactant for the separation and characterization of glycopeptide glycoforms of a proteolytic-resistant glycoprotein by capillary electrophoresis time-of-flight mass spectrometry

scientific article published on 16 October 2015

Improvement of the titrimetric method for the determination of total basicity and available lysine residues in proteinaceous samples in anhydrous acetic acid

Improving the sensitivity of the determination of ceftiofur by capillary electrophoresis in environmental water samples: in-line solid phase extraction and sample stacking techniques.

scientific article published on 21 January 2007

Influence of pH and pKa values on electrophoretic behaviour of quinolones in aqueous and hydro-organic media

scientific article published on 01 February 2000

Investigation of commercial sorbents for the analysis of opioid peptides in human plasma by on-line SPE-CE.

scientific article published in May 2010

Investigation of synthetic peptide hormones by liquid chromatography coupled to pneumatically assisted electrospray ionization mass spectrometry: analysis of a synthesis crude of peptide triptorelin

scientific article published in January 2001

Ionic equilibria in amphiprotic solvents of low dielectric constant

Liquid chromatography-electrospray mass spectrometry of multicomponent peptide mixtures. Characterization of a mixture from the synthesis of the hormone goserelin

scientific article published on 01 August 2000

Liquid chromatography-mass spectrometry and capillary electrophoresis combined approach for separation and characterization of multicomponent peptide mixtures. Application to crude products of leuprolide synthesis

scientific article

Liquid chromatography-mass spectrometry approach for the characterization and purification of crude synthetic peptide hormones

scientific article published on 30 July 2003

Lowering the concentration limits of detection by on-line solid-phase extraction-capillary electrophoresis-electrospray mass spectrometry

scientific article published on 18 December 2006

Metabolic profiling for the identification of Huntington biomarkers by on-line solid-phase extraction capillary electrophoresis mass spectrometry combined with advanced data analysis tools

scientific article

Metabolic study of enrofloxacin and metabolic profile modifications in broiler chicken tissues after drug administration

scientific article published on 16 September 2014

Metabolomic assays of amoxicillin, cephapirin and ceftiofur in chicken muscle: application to treated chicken samples by liquid chromatography quadrupole time-of-flight mass spectrometry

scientific article

Modeling the electrophoretic behavior of quinolones in aqueous and hydroorganic media.

scientific article published in March 2010

Modeling the migration behavior of rabbit liver apothioneins in capillary electrophoresis.

scientific article published in July 2008

Modelling migration behavior of peptide hormones in capillary electrophoresis-electrospray mass spectrometry.

scientific article published on 17 April 2006

Modelling retention in liquid chromatography as a function of solvent composition and pH of the mobile phase

scientific article published on 01 February 2000

Modelling the electrophoretic migration behaviour of peptides and glycopeptides from glycoprotein digests in capillary electrophoresis-mass spectrometry.

scientific article published on 29 October 2014

Multi residue determination of the penicillins regulated by the European Union, in bovine, porcine and chicken muscle, by LC-MS/MS

scientific article published on 22 July 2012

Multiclass method for the determination of quinolones and β-lactams, in raw cow milk using dispersive liquid-liquid microextraction and ultra high performance liquid chromatography-tandem mass spectrometry

scientific article published on 20 June 2014

Multiresidue determination of quinolones regulated by the European Union in bovine and porcine plasma. Application of chromatographic and capillary electrophoretic methodologies.

scientific article

New extraction procedure to improve the determination of quinolones in poultry muscle by liquid chromatography with ultraviolet and mass spectrometric detection

scientific article published on 01 August 2006

On-line immunoaffinity solid-phase extraction capillary electrophoresis mass spectrometry for the analysis of large biomolecules: A preliminary report

scientific article published on 12 June 2014

Pentacyclic triterpene in Olea europaea L: A simultaneous determination by high-performance liquid chromatography coupled to mass spectrometry

scientific article

Prediction of chromatographic retention, pKa values and optimization of the separation of polyphenolic acids in strawberries

scientific article published in November 2002

Prediction of electrophoretic behaviour of a series of quinolones in aqueous methanol

scientific article published on 01 June 2001

Prediction of electrophoretic mobilities in non-aqueous capillary electrophoresis. Optimal separation of quinolones in acetonitrile-water media

scientific article published on 01 February 2000

Prediction of retention behaviour and evaluation of pka values of peptides and quinolones in liquid chromatography

scientific article published in November 2001

Preparation and evaluation of an immunoaffinity sorbent for the analysis of opioid peptides by on-line immunoaffinity solid-phase extraction capillary electrophoresis-mass spectrometry

scientific article published on 14 December 2011

Protonation equilibria of quinolone antibacterials in acetonitrile-water mobile phases used in LC.

scientific article published in July 1997

Quechers methodologies as an alternative to solid phase extraction (SPE) for the determination and characterization of residues of cephalosporins in beef muscle using LC-MS/MS

scientific article published on 06 May 2012

Resolution of acid strength in tetrahydrofuran of substituted benzoic acids

article published in 1992

Retention behaviour of peptides, quinolones, diuretics and peptide hormones in liquid chromatography. Influence of ionic strength and pH on chromatographic retention.

scientific article published in April 2001

Retention behaviour of quinolone derivatives in high-performance liquid chromatography. Effect of pH and evaluation of ionization constants.

scientific article published in October 1998

Sensitivity enhancement for the analysis of naproxen in tap water by solid-phase extraction coupled in-line to capillary electrophoresis.

scientific article

Separation and characterization of multicomponent peptide mixtures by liquid chromatography-electrospray ionization mass spectrometry. Application to crude products of the synthesis of leuprolide

scientific article published on 01 February 2000

Separation and characterization of rabbit liver apothioneins by capillary electrophoresis coupled to electrospray ionization time-of-flight mass spectrometry

scientific article published on 01 September 2006

Separation and characterization of superoxide dismutase 1 (SOD-1) from human erythrocytes by capillary electrophoresis time-of-flight mass spectrometry

scientific article published on 01 August 2012

Separation of potentially therapeutic peptide hormones by liquid chromatography. Optimisation of the composition and pH of the mobile phase.

scientific article published in February 2000

Simultaneous determination and toxicological assessment of penicillins in different water matrices

scientific article published on 04 September 2014

Solvatochromic parameter values and pH in acetonitrile-water mixtures. Optimization of mobile phase for the separation of peptides by high-performance liquid chromatography

scientific article published on 01 February 1996

Spectrophotometric, potentiometric and chromatographic pKa values of polyphenolic acids in water and acetonitrile–water media

Standard pH values for standardization of potentiometric sensors in 10% (w/w) acetonitrile-water mixtures

scientific article published on 01 May 1994

Standardization of potentiometric sensors in tetrahydrofuran

Study of neutralisation indicators in propan-2-ol: their pKavalues and chromatic parameters of transition ranges

Teaching chemistry in Europe--a look at future developments

scientific article published on 13 November 2003

Towards a reliable molecular mass determination of intact glycoproteins by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.

scientific article

pH measurements in acetonitrile-water mixtures by use of a glass electrode.

scientific article published in October 1992

pKa values of peptides in aqueous and aqueous-organic media. Prediction of chromatographic and electrophoretic behaviour

scientific article published on 01 January 2002

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