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List of works by R. Herráez-Hernández

A cost-effective method for estimating di(2-ethylhexyl)phthalate in coastal sediments.

scientific article

A method for the determination of dimethylamine in air by collection on solid support sorbent with subsequent derivatization and spectrophotometric analysis.

scientific article published in December 2004

A microanalytical method for ammonium and short-chain primary aliphatic amines using precolumn derivatization and capillary liquid chromatography

A miniaturized method for estimating di(2-ethylhexyl) phthalate in bivalves as bioindicators

scientific article published on 6 September 2012

A new selective method for dimethylamine in water analysis by liquid chromatography using solid-phase microextraction and two-stage derivatization with o-phthalaldialdehyde and 9-fluorenylmethyl chloroformate

scientific article published in June 2005

Advantages of monolithic over particulate columns for multiresidue analysis of organic pollutants by in-tube solid-phase microextraction coupled to capillary liquid chromatography

article

Analysis of Contact Traces of Cannabis by In-Tube Solid-Phase Microextraction Coupled to Nanoliquid Chromatography

scientific article published on 15 September 2018

Analysis of methylamine by solid-phase microextraction and HPLC after on-fibre derivatization with 9-fluorenylmethyl chloroformate

Application of column-switching techniques to the determination of medium polarity drugs: determination of acetazolamide in urine

scientific article published on 01 March 1994

Application of solid-phase microextraction combined with derivatization to the determination of amphetamines by liquid chromatography.

scientific article published in October 2004

Automated determination of amphetamine enantiomers using a two-dimensional column-switching chromatographic system for derivatization and separation

Automated on-line dialysis for sample preparation for gas chromatography: determination of benzodiazepines in human plasma.

scientific article published in June 1996

Automated trace enrichment for screening and/or determination of primary, secondary and tertiary amphetamines in biological samples by liquid chromatography

scientific article published on 01 March 1999

Bimodal copper oxide nanoparticles doped phase for the extraction of highly polar compounds by in-tube solid-phase microextraction coupled on-line to nano-liquid chromatography

scientific article published on 19 December 2019

COMPARATIVE STUDY OF C18- AND STYRENE-DIVINYLBENZENE-BASED SORBENTS FOR THE ENRICHMENT OF PHENOLS FROM WATER

Chiral determination of amphetamine and related compounds using chloroformates for derivatization and high-performance liquid chromatography

scientific article published on 01 October 1998

Cleaning sorbents used in matrix solid-phase dispersion with sonication: Application to the estimation of polycyclic aromatic hydrocarbons at ng/g levels in marine sediments

scientific article published on 17 September 2012

Collaborative study of an liquid chromatographic method for the determination of R-timolol and other related substances in S-timolol maleate

Column-switching techniques for screening of diuretics and probenecid in urine samples

scientific article published on 01 January 1994

Comparative study of the determination of trimethylamine in water and air by combining liquid chromatography and solid-phase microextraction with on-fiber derivatization

scientific article published on 15 December 2005

Derivatization of ephedrine with o-phthaldialdehyde for liquid chromatography after treatment with sodium hypochlorite

article

Derivatization of tertiary amphetamines with 9-fluorenylmethyl chloroformate for liquid chromatography: determination of N-methylephedrine

scientific article published on 01 June 2000

Determination of amphetamine and related compounds in urine using on-line derivatization in octadecyl silica columns with 9-fluorenylmethyl chloroformate and liquid chromatography

scientific article published on 01 April 1996

Determination of the total concentration of highly protein-bound drugs in plasma by on-line dialysis and column liquid chromatography: application to non-steroidal anti-inflammatory drugs

scientific article published on 01 April 1995

Enantiomeric separation of amphetamine and related compounds by liquid chromatography using precolumn derivatization witho-phthaldialdehyde

Estimation of diuretic drugs in biological fluids by HPLC

Generalised H-point standard addition method for the isolation of the analyte signal from the sample signal when coelution of unknown compounds occurs in liquid chromatography

article

H-Point Curve Isolation Method for Coupled Liquid Chromatography and UV−Visible Spectrophotometry

scientific article published on 01 June 2000

High-performance liquid chromatographic determination of spironolactone and its major metabolite canrenone in urine using ultraviolet detection and column-switching

scientific article published on 01 August 1994

Improved amphetamine and methamphetamine determination in urine by normal-phase high-performance liquid chromatography with sodium 1,2-naphthoquinone 4-sulphonate as derivatizing agent and solid-phase extraction for sample clean-up

scientific article published on 01 January 1995

Improved detection limit for ammonium/ammonia achieved by Berthelot's reaction by use of solid-phase extraction coupled to diffuse reflectance spectroscopy

Improving analysis of apolar organic compounds by the use of a capillary titania-based column: Application to the direct determination of faecal sterols cholesterol and coprostanol in wastewater samples

scientific article published in July 2010

In-tube solid-phase microextraction coupled by in valve mode to capillary LC-DAD: Improving detectability to multiresidue organic pollutants analysis in several whole waters.

scientific article

In-tube solid-phase microextraction-capillary liquid chromatography as a solution for the screening analysis of organophosphorus pesticides in untreated environmental water samples

article published in 2007

Influence of the presence of surfactants and humic acid in waters on the indophenol-type reaction method for ammonium determination

scientific article published on 23 January 2006

Liquid chromatographic determination of aliphatic amines in water using solid support assisted derivatization with 9-fluorenylmethyl chloroformate

Liquid chromatographic determination of trimethylamine in water.

scientific article published in January 2004

More about sampling and estimation of mercaptans in air samples.

scientific article published on 7 December 2012

New micromethod combining miniaturized matrix solid-phase dispersion and in-tube in-valve solid-phase microextraction for estimating polycyclic aromatic hydrocarbons in bivalves.

scientific article published on 27 September 2008

On-Line Derivatization into Precolumns for the Determination of Drugs by Liquid Chromatography and Column Switching: Determination of Amphetamines in Urine

scientific article published on 01 March 1996

On-fibre solid-phase microextraction coupled to conventional liquid chromatography versus in-tube solid-phase microextraction coupled to capillary liquid chromatography for the screening analysis of triazines in water samples

article

On-line determination of aliphatic amines in water using in-tube solid-phase microextraction-assisted derivatisation in in-valve mode for processing large sample volumes in LC.

scientific article published on 4 March 2009

On-line in-tube solid phase microextraction-capillary liquid chromatography method for monitoring degradation products of di-(2-ethylhexyl) phthalate in waters

scientific article published on 02 May 2014

Quantitative Analysis of Terpenic Compounds in Microsamples of Resins by Capillary Liquid Chromatography

scientific article published on 10 November 2019

Rapid analysis of effluents generated by the dairy industry for fat determination by preconcentration in nylon membranes and attenuated total reflectance infrared spectroscopy measurement

Selective determination of trimethylamine in air by liquid chromatography using solid phase extraction cartridges for sampling.

scientific article

Sensitive determination of methylenedioxylated amphetamines by liquid chromatography.

scientific article published in May 2001

Separation of the enantiomers of primary and secondary amphetamines by liquid chromatography after derivatization with (−)-1-(9-fluorenyl)ethyl chloroformate

Strategies for the enantiomeric determination of amphetamine and related compounds by liquid chromatography.

scientific article

Study of the influence of temperature and precipitations on the levels of BTEX in natural waters.

scientific article

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