Author

Patrick Butcher

Observed names: Butcher, Patrick, P. Butcher

Observed institution: Kanton Zürich

ORCID: 0000-0002-6450-3526

Observed ORCID: 0000-0002-6450-3526

OpenAlex ID: A5036016348

Quantitative multiresidue method for about 100 veterinary drugs in different meat matrices by sub 2-μm particulate high-performance liquid chromatography coupled to time of flight mass spectrometry

2008 · Anton Kaufmann, Patrick Butcher, et al. · Journal of Chromatography A · 193

Comprehensive comparison of liquid chromatography selectivity as provided by two types of liquid chromatography detectors (high resolution mass spectrometry and tandem mass spectrometry): “Where is the crossover point?”

2010 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 188

Development of an improved high resolution mass spectrometry based multi-residue method for veterinary drugs in various food matrices

2010 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 153

Ultra-performance liquid chromatography coupled to time of flight mass spectrometry (UPLC–TOF): A novel tool for multiresidue screening of veterinary drugs in urine

2006 · Anton Kaufmann, Patrick Butcher, et al. · Analytica Chimica Acta · 137

Determination of aminoglycoside residues by liquid chromatography and tandem mass spectrometry in a variety of matrices

2011 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 121

Determination of nitrofuran and chloramphenicol residues by high resolution mass spectrometry versus tandem quadrupole mass spectrometry

2014 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 111

Quantitative and confirmative performance of liquid chromatography coupled to high‐resolution mass spectrometry compared to tandem mass spectrometry

2011 · Anton Kaufmann, Patrick Butcher, et al. · Rapid Communications in Mass Spectrometry · 100

Are liquid chromatography/electrospray tandem quadrupole fragmentation ratios unequivocal confirmation criteria?

2009 · Anton Kaufmann, Patrick Butcher, et al. · Rapid Communications in Mass Spectrometry · 86

Quantification of anthelmintic drug residues in milk and muscle tissues by liquid chromatography coupled to Orbitrap and liquid chromatography coupled to tandem mass spectrometry

2011 · A. Kaufmann, P. Butcher, et al. · Talanta · 71

False‐positive liquid chromatography/tandem mass spectrometric confirmation of sebuthylazine residues using the identification points system according to EU directive 2002/657/EC due to a biogenic insecticide in tarragon

2009 · Andreas Schürmann, Veronika Dvorak, et al. · Rapid Communications in Mass Spectrometry · 64

Multi-residue quantification of veterinary drugs in milk with a novel extraction and cleanup technique: Salting out supported liquid extraction (SOSLE)

2014 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 61

Strategies to avoid false negative findings in residue analysis using liquid chromatography coupled to time‐of‐flight mass spectrometry

2006 · Anton Kaufmann, Patrick Butcher · Rapid Communications in Mass Spectrometry · 57

Reliability of veterinary drug residue confirmation: High resolution mass spectrometry versus tandem mass spectrometry

2014 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 52

Semi-targeted residue screening in complex matrices with liquid chromatography coupled to high resolution mass spectrometry: current possibilities and limitations

2011 · Anton Kaufmann, Patrick Butcher, et al. · The Analyst · 52

Simplifying Nontargeted Analysis of PFAS in Complex Food Matrixes

2022 · Anton Kaufmann, Patrick Butcher, et al. · Journal of AOAC International · 43

Study of High-Resolution Mass Spectrometry Technology as a Replacement for Tandem Mass Spectrometry in the Field of Quantitative Pesticide Residue Analysis

2012 · Anton Kaufmann, Veronika Dvorak, et al. · Journal of AOAC International · 42

Quantitative liquid chromatography/tandem mass spectrometry determination of chloramphenicol residues in food using sub‐2 µm particulate high‐performance liquid chromatography columns for sensitivity and speed

2005 · Anton Kaufmann, Patrick Butcher · Rapid Communications in Mass Spectrometry · 34

Trace level quantification of streptomycin in honey with liquid chromatography/tandem mass spectrometry

2003 · Anton Kaufmann, Patrick Butcher, et al. · Rapid Communications in Mass Spectrometry · 31

Improving the QuEChERS Liquid/Liquid Extraction of Analytes With Widely Varying Physicochemical Properties: Example of 201 Veterinary Drugs in Milk

2022 · Anton Kaufmann, Patrick Butcher, et al. · Journal of AOAC International · 27

Using In Silico Fragmentation to Improve Routine Residue Screening in Complex Matrices

2017 · Anton Kaufmann, Patrick Butcher, et al. · Journal of the American Society for Mass Spectrometry · 27

Does the ion mobility resolving power as provided by commercially available ion mobility quadrupole time-of-flight mass spectrometry instruments permit the unambiguous identification of small molecules in complex matrices?

2020 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 24

High-resolution mass spectrometry–based multi-residue method covering relevant steroids, stilbenes and resorcylic acid lactones in a variety of animal-based matrices

2018 · A. Kaufmann, P. Butcher, et al. · Analytica Chimica Acta · 19

Analysis of a variety of inorganic and organic additives in food products by ion-pairing liquid chromatography coupled to high-resolution mass spectrometry

2018 · Anton Kaufmann, Mirjam Widmer, et al. · Analytical and Bioanalytical Chemistry · 18

Practical application of in silico fragmentation based residue screening with ion mobility high‐resolution mass spectrometry

2017 · Anton Kaufmann, Patrick Butcher, et al. · Rapid Communications in Mass Spectrometry · 18

Segmented post‐column analyte addition; a concept for continuous response control of liquid chromatography/mass spectrometry peaks affected by signal suppression/enhancement

2005 · Anton Kaufmann, Patrick Butcher · Rapid Communications in Mass Spectrometry · 18

Works count: 33

Citation count: 1,806

H-index: 21

I10-index: 29