| Determination of morphine, morphine-3-glucuronide and morphine-6-glucuronide in human serum by solid-phase extraction and liquid chromatography-mass spectrometry with … N Tyrefors, B Hyllbrant, L Ekman, M Johansson, B Långström Journal of chromatography A 729 (1-2), 279-285, 1996 | 103 | 1996 |
| High-performance liquid chromatography–tandem electrospray mass spectrometry for the determination of lidocaine and its metabolites in human plasma and urine M Abdel-Rehim, M Bielenstein, Y Askemark, N Tyrefors, T Arvidsson Journal of Chromatography B: Biomedical Sciences and Applications 741 (2 …, 2000 | 85 | 2000 |
| Determination of fentanyl in human plasma and fentanyl and norfentanyl in human urine using LC–MS/MS NH Huynh, N Tyrefors, L Ekman, M Johansson Journal of pharmaceutical and biomedical analysis 37 (5), 1095-1100, 2005 | 81 | 2005 |
| Interface for open tubular column supercritical fluid chromatography/atmospheric pressure chemical ionization mass spectrometry LN Tyrefors, RX Moulder, KE Markides Analytical Chemistry 65 (20), 2835-2840, 1993 | 65 | 1993 |
| Trace analysis of fluoxetine and its metabolite norfluoxetine. Part II: Enantioselective quantification and studies of matrix effects in raw and treated wastewater by solid … VKH Barclay, NL Tyrefors, IM Johansson, CE Pettersson Journal of chromatography A 1227, 105-114, 2012 | 61 | 2012 |
| Temporal lobe epilepsy visualized with PET with 11 C‐L‐deuterium‐deprenyl–analysis of kinetic data M Bergström, E Kumlien, A Lilja, N Tyrefors, G Westerberg, B Långström Acta neurologica scandinavica 98 (4), 224-231, 1998 | 59 | 1998 |
| Trace analysis of fluoxetine and its metabolite norfluoxetine. Part I: development of a chiral liquid chromatography–tandem mass spectrometry method for wastewater samples VKH Barclay, NL Tyrefors, IM Johansson, CE Pettersson Journal of Chromatography A 1218 (33), 5587-5596, 2011 | 53 | 2011 |
| Chiral analysis of metoprolol and two of its metabolites, α-hydroxymetoprolol and deaminated metoprolol, in wastewater using liquid chromatography–tandem mass spectrometry VKH Barclay, NL Tyrefors, IM Johansson, CE Pettersson Journal of Chromatography A 1269, 208-217, 2012 | 50 | 2012 |
| Reversed-phase ion-pair chromatography coupled to electrospray ionisation mass spectrometry by on-line removal of the counter-ions BH Forngren, J Samskog, SÅ Gustavsson, N Tyrefors, KE Markides, ... Journal of Chromatography A 854 (1-2), 155-162, 1999 | 33 | 1999 |
| On the use of liquid chromatography with radio-and ultraviolet absorbance detection coupled to mass spectrometry for improved sensitivity and selectivity in determination of … B Hyllbrant, N Tyrefors, KE Markides, B Långström Journal of pharmaceutical and biomedical analysis 20 (3), 493-501, 1999 | 32 | 1999 |
| Improvements in the separation and detection of acetylcholine and choline using liquid chromatography and electrochemical detection N Tyrefors, A Carlsson Journal of Chromatography A 502, 337-349, 1990 | 26 | 1990 |
| Determination of acetylcholine and choline in microdialysates from spinal cord of rat using liquid chromatography with electrochemical detection N Tyrefors, PG Gillberg Journal of Chromatography B: Biomedical Sciences and Applications 423, 85-91, 1987 | 25 | 1987 |
| Determination of raclopride in human plasma by on-column focusing packed capillary liquid chromatography–electrospray ionisation mass spectrometry BH Forngren, N Tyrefors, KE Markides, B Långström Journal of Chromatography B: Biomedical Sciences and Applications 748 (1 …, 2000 | 17 | 2000 |
| Synthesis of a 11C‐labelled derivative of the N‐methyl‐D‐aspartate receptor antagonist MK‐801 Y Andersson, N Tyrefors, S Sihver, H Onoe, Y Watanabe, H Tsukada, ... Journal of Labelled Compounds and Radiopharmaceuticals 41 (6), 567-576, 1998 | 12 | 1998 |
| Analysis of L-[methyl-11C] methionine and metabolites in human plasma by an automated solid-phase extraction and a high-performance liquid chromatographic procedure KJ Lindner, P Hartvig, C Åkesson, N Tyrefors, A Sundin, B Långström Journal of Chromatography B: Biomedical Sciences and Applications 679 (1-2 …, 1996 | 12 | 1996 |
| Packed capillary column liquid chromatography coupled to mass spectrometry by a simple modification of an electrospray interface B Hyllbrant, N Tyrefors, B Långström, KE Markides Journal of Microcolumn Separations 11 (5), 353-358, 1999 | 10 | 1999 |
| An automated liquid chromatographic plasma analysis of amino acids used in combination with positron emission tomography (PET) for determination of in vivo plasma kinetics KJ Lindner, P Hartvig, N Tyrefors, C Hedlund, B Långström Journal of pharmaceutical and biomedical analysis 13 (4-5), 353-359, 1995 | 9 | 1995 |
| Langstrom. Synthesis of a C-11-labelled derivate of the NMDA receptor antagonist MK-801 Y Andersson, N Tyrefors, S Sihver, H Onoe, Y Watanave, H Tsukada J Lab Compd Radiopharm 41, 567-576, 1998 | 8 | 1998 |
| Determination of flumazenil in human plasma by liquid chromatography–electrospray ionisation tandem mass spectrometry M Lavén, L Appel, R Moulder, N Tyrefors, K Markides, B Långström Journal of Chromatography B 808 (2), 221-227, 2004 | 7 | 2004 |
| Two new types of assays to determine protein concentrations in biological fluids using mass spectrometry of intact proteins with cystatin C in spinal fluid as an example N Tyrefors, P Michelsen, A Grubb Scandinavian Journal of Clinical and Laboratory Investigation 74 (6), 546-554, 2014 | 5 | 2014 |
