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List of works by André De Villiers

A new concept for variance analysis of hyphenated chromatographic data avoiding signal warping ⬇️

scientific article published on March 27, 2013

Advanced ultra high pressure liquid chromatography-tandem mass spectrometric methods for the screening of red wine anthocyanins and derived pigments.

scientific article published on 3 March 2012

Analysis of honeybush tea (Cyclopia spp.) volatiles by comprehensive two-dimensional gas chromatography using a single-stage thermal modulator.

scientific article published on 17 April 2017

Analytical techniques for wine analysis: An African perspective; a review ⬇️

scientific article published on December 21, 2011

Characterisation of volatile components of Pinotage wines using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC–TOFMS)

scientific article published in November 2011

Chemometric analysis of chromatographic fingerprints shows potential of Cyclopia maculata (Andrews) Kies for production of standardized extracts with high xanthone content

scientific article published on 20 October 2014

Chemometric investigation of the volatile content of young South African wines

scientific article published in October 2011

Combined size exclusion chromatography, supercritical fluid chromatography and electrospray ionization mass spectrometry for the analysis of complex aliphatic polyesters

scientific article published on 15 January 2014

Comprehensive Three-Dimensional LC × LC × Ion Mobility Spectrometry Separation Combined with High-Resolution MS for the Analysis of Complex Samples

article

Comprehensive Two-Dimensional Hydrophilic Interaction Chromatography (HILIC) × Reversed-Phase Liquid Chromatography Coupled to High-Resolution Mass Spectrometry (RP-LC-UV-MS) Analysis of Anthocyanins and Derived Pigments in Red Wine.

scientific article published on 10 November 2015

Comprehensive analysis of tara tannins by reversed-phase and hydrophilic interaction chromatography coupled to ion mobility and high-resolution mass spectrometry

scientific article published on 19 June 2019

Comprehensive two-dimensional gas chromatography for the analysis of Fischer-Tropsch oil products

scientific article published on 30 October 2010

Comprehensive two-dimensional gas chromatography for the analysis of synthetic and crude-derived jet fuels

scientific article

Comprehensive two-dimensional liquid chromatographic analysis of anthocyanins

scientific article published on 22 July 2014

Comprehensive two-dimensional liquid chromatographic analysis of rooibos (Aspalathus linearis) phenolics

article

Comprehensive two-dimensional liquid chromatography applying two parallel columns in the second dimension

scientific article published on 17 November 2007

Comprehensive two-dimensional liquid chromatography coupled to the ABTS radical scavenging assay: a powerful method for the analysis of phenolic antioxidants.

scientific article published on 11 May 2014

Considerations on the possibilities and limitations of comprehensive normal phase-reversed phase liquid chromatography (NPLC x RPLC).

scientific article published in March 2006

Deciphering the chemical instability of sphaeropsidin A under physiological conditions - degradation studies and structural elucidation of the major metabolite

scientific article published on 05 October 2020

Detailed Phenolic Characterization of Protea Pure and Hybrid Cultivars by Liquid Chromatography-Ion Mobility-High Resolution Mass Spectrometry (LC-IM-HR-MS)

scientific article published on 07 January 2020

Detailed qualitative analysis of honeybush tea (Cyclopia spp.) volatiles by comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry and relation with sensory data.

scientific article

Determination of anthocyanins in wine by direct injection liquid chromatography-diode array detection-mass spectrometry and classification of wines using discriminant analysis

scientific article published in October 2004

Effect of analyte properties on the kinetic performance of liquid chromatographic separations

scientific article

Enhancing the Possibilities of Comprehensive Two-Dimensional Liquid Chromatography through Hyphenation of Purely Aqueous Temperature-Responsive and Reversed-Phase Liquid Chromatography.

scientific article published on 18 March 2018

Evaluation of capillary electrophoresis for the analysis of rooibos and honeybush tea phenolics

scientific article published on 6 December 2016

Evaluation of ultra performance liquid chromatography. Part I. Possibilities and limitations.

scientific article published on 23 June 2006

Fast method development of rooibos tea phenolics using a variable column length strategy

scientific article published on 25 August 2011

Food ingredient extracts of Cyclopia subternata (Honeybush): variation in phenolic composition and antioxidant capacity.

scientific article published on 7 December 2012

Fractionation by liquid chromatography combined with comprehensive two-dimensional gas chromatography-mass spectrometry for analysis of cyclics in oligomerisation products of Fischer-Tropsch derived light alkenes

scientific article

High efficiency liquid chromatography on conventional columns and instrumentation by using temperature as a variable. Kinetic plots and experimental verification.

scientific article

High performance liquid chromatography analysis of wine anthocyanins revisited: effect of particle size and temperature.

scientific article published on 21 February 2009

High-dimensional nested analysis of variance to assess the effect of production season, quality grade and steam pasteurization on the phenolic composition of fermented rooibos herbal tea.

scientific article published on 25 June 2013

High-efficiency high performance liquid chromatographic analysis of red wine anthocyanins

scientific article published on 18 May 2011

Hydrophilic interaction chromatographic analysis of anthocyanins.

scientific article

Identity confirmation of anthocyanins in berries by LC-DAD-IM-QTOFMS

scientific article published on 13 November 2020

Improving the universal response of evaporative light scattering detection by mobile phase compensation

scientific article published on 31 May 2007

Influence of frictional heating on temperature gradients in ultra-high-pressure liquid chromatography on 2.1mm I.D. columns.

scientific article

Investigation of the validity of the kinetic plot method to predict the performance of coupled column systems operated at very high pressures under different thermal conditions.

scientific article published on 5 March 2009

Investigation of the volatile composition of pinotage wines fermented with different malolactic starter cultures using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC-TOF-MS).

scientific article

Kinetic optimisation of the reversed phase liquid chromatographic separation of proanthocyanidins on sub-2 μm and superficially porous phases

scientific article published on 5 March 2012

Kinetic optimisation of the reversed phase liquid chromatographic separation of rooibos tea (Aspalathus linearis) phenolics on conventional high performance liquid chromatographic instrumentation

scientific article published on 12 November 2011

Method to predict and compare the influence of the particle size on the isocratic peak capacity of high-performance liquid chromatography columns

scientific article published on 23 February 2007

Modeling of the total antioxidant capacity of rooibos (Aspalathus linearis) tea infusions from chromatographic fingerprints and identification of potential antioxidant markers

scientific article

Multivariate analysis of variance of designed chromatographic data. A case study involving fermentation of rooibos tea.

scientific article

Off-line comprehensive 2-dimensional hydrophilic interaction x reversed phase liquid chromatography analysis of procyanidins.

scientific article published in July 2009

Off-line comprehensive two-dimensional hydrophilic interaction x reversed phase liquid chromatographic analysis of green tea phenolics

scientific article published in March 2010

Optimization of a high-resolution radical scavenging assay coupled on-line to reversed-phase liquid chromatography for antioxidant detection in complex natural extracts

scientific article published on 27 January 2015

Phenolic profiling of rooibos using off-line comprehensive normal phase countercurrent chromatography×reversed phase liquid chromatography

scientific article published on 14 February 2017

Predictive kinetic optimisation of hydrophilic interaction chromatography × reversed phase liquid chromatography separations: Experimental verification and application to phenolic analysis

scientific article published on 04 August 2018

Solid phase extraction in combination with comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry for the detailed investigation of volatiles in South African red wines.

scientific article published on 15 June 2011

Speciation of [Pt(IV) Cl6-n Brn]2- (n = 0-6) and some of their mono-aquated [Pt(IV) Cl5-n Brn (H2O)]- (n = 0-5) anions in solution at low concentrations by means of ion-pairing reversed-phase ultra-high-performance liquid chromatography coupled to e

scientific article published in March 2014

Stir bar sorptive extraction combined with GC-MS analysis and chemometric methods for the classification of South African Wines according to the volatile composition

scientific article published on 21 May 2008

Survey of 3-alkyl-2-methoxypyrazine content of South African Sauvignon blanc wines using a novel LC-APCI-MS/MS method.

scientific article

Systematic optimisation and evaluation of on-line, off-line and stop-flow comprehensive hydrophilic interaction chromatography×reversed phase liquid chromatographic analysis of procyanidins, part I: theoretical considerations

scientific article published on 17 March 2013

Systematic optimisation and evaluation of on-line, off-line and stop-flow comprehensive hydrophilic interaction chromatography×reversed phase liquid chromatographic analysis of procyanidins. Part II: application to cocoa procyanidins

scientific article published on 17 March 2013

Toward automated chromatographic fingerprinting: A non-alignment approach to gas chromatography mass spectrometry data

scientific article

Toward unraveling grape tannin composition: application of online hydrophilic interaction chromatography × reversed-phase liquid chromatography-time-of-flight mass spectrometry for grape seed analysis

scientific article published on 13 September 2013

Variation in phenolic content and antioxidant activity of fermented rooibos herbal tea infusions: role of production season and quality grade

scientific article published on 4 September 2012

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