H. J. Helmlin

Analysis of 3,4-Methylenedioxymethamphetamine (MDMA) and its Metabolites in Plasma and Urine by HPLC-DAD and GC-MS

H. J. Helmlin, K. Bracher, Daniel Bourquin et al. · Journal of Analytical Toxicology · 1996 · 160 citations

Determination of psychotropic phenylalkylamine derivatives in biological matrices by high-performance liquid chromatography with photodiode-array detection

H. J. Helmlin, Rudolf Brenneisen · Journal of Chromatography A · 1992 · 44 citations

Biochemistry, Gas Chromatography, Medicine +12

Detection of the diuretic hydrochlorothiazide in a doping control urine sample as the result of a non-steroidal anti-inflammatory drug (NSAID) tablet contamination

H. J. Helmlin, André Mürner, Samuel Steiner et al. · Forensic Science International · 2016 · 35 citations

Drug Safety, Urology, Diuretic Hydrochlorothiazide +11

Qualitative and quantitative determination of illicit heroin street samples by reversed-phase high-performance liquid chromatography: method development by CARTAGO-S

Kathrin Grogg-Sulser, H. J. Helmlin, Jean-Thomas Clerc · Journal of Chromatography A · 1995 · 17 citations

Substance Abuse, Substance Use, Health Sciences +11

Determination of phenylethylamines in hallucinogenic cactus species by high-performance liquid chromatography with photodiode-array detection

H. J. Helmlin, Daniel Bourquin, Rudolf Brenneisen · Journal of Chromatography A · 1992 · 14 citations

Photodiode-array Detection, Engineering, Photochemistry +9