Helena Keski-Hynnilä

Comparison of Electrospray, Atmospheric Pressure Chemical Ionization, and Atmospheric Pressure Photoionization in the Identification of Apomorphine, Dobutamine, and Entacapone Phase II Metabolites in Biological Samples

Helena Keski-Hynnilä, Mika Kurkela, Eivor Elovaara et al. · Analytical Chemistry · 2002 · 111 citations

Pharmacy, Pharmacology, Toxicology +17

Polycyclic aromatic hydrocarbon (PAH) metabolizing enzyme activities in human lung, and their inducibility by exposure to naphthalene, phenanthrene, pyrene, chrysene, and benzo(a)pyrene as shown in the rat lung and liver

Eivor Elovaara, Jouni Mikkola, Helene Stockmann‐Juvala et al. · Archives of Toxicology · 2006 · 63 citations

Pharmacy, Biochemistry, Toxicology +15

First-derivative UV spectrophotometric and high-performance liquid chromatographic analysis of some thiazide diuretics in the presence of their photodecomposition products

Veikko Ulvi, Helena Keski-Hynnilä · Journal of Pharmaceutical and Biomedical Analysis · 1994 · 30 citations

Pharmacy, Chemistry, Pharmaceutical Analysis +15

Quantitation of entacapone glucuronide in rat plasma by on-line coupled restricted access media column and liquid chromatography–tandem mass spectrometry

Helena Keski-Hynnilä, Knut Raanaa, Markus Forsberg et al. · Journal of Chromatography B Biomedical Sciences and Applications · 2001 · 28 citations

Pharmacy, Pharmaceutical Analysis, Pharmacokinetics +8

Direct analysis of nitrocatechol-type glucuronides in urine by capillary electrophoresis–electrospray ionisation mass spectrometry and tandem mass spectrometry

Helena Keski-Hynnilä, Knut Raanaa, Jyrki Taskinen et al. · Journal of Chromatography B Biomedical Sciences and Applications · 2000 · 27 citations

Pharmacy, Biochemistry, Analytical Chemistry +12