Stephan Walker

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?”

Anton Kaufmann, Patrick Butcher, Kathryn Maden et al. · Analytica Chimica Acta · 2010 · 184 citations

Pharmacy, Chemistry, Pharmaceutical Analysis +17

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

Anton Kaufmann, Patrick Butcher, K. Maden et al. · Analytica Chimica Acta · 2010 · 147 citations

Natural Sciences, Food Science, Pharmaceutical Analysis +15

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

Anton Kaufmann, Patrick Butcher, K. Maden et al. · Analytica Chimica Acta · 2014 · 111 citations

Pharmacy, Chemistry, Pharmaceutical Analysis +11

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

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

Pharmacy, Chemistry, Pharmaceutical Analysis +16

Stable-Isotope Labeled Hydrophobic Hydrazide Reagents for the Relative Quantification of N-Linked Glycans by Electrospray Ionization Mass Spectrometry

Stephan Walker, Januka Budhathoki-Uprety, Bruce M. Novak et al. · Analytical Chemistry · 2011 · 92 citations · Full text

Life Sciences, Biochemistry, Analytical Chemistry +16