Niklas Tyrefors

555 total citations
19 papers, 465 citations indexed

About

Niklas Tyrefors is a scholar working on Spectroscopy, Analytical Chemistry and Pollution. According to data from OpenAlex, Niklas Tyrefors has authored 19 papers receiving a total of 465 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Spectroscopy, 7 papers in Analytical Chemistry and 4 papers in Pollution. Recurrent topics in Niklas Tyrefors's work include Analytical Chemistry and Chromatography (7 papers), Mass Spectrometry Techniques and Applications (5 papers) and Analytical chemistry methods development (4 papers). Niklas Tyrefors is often cited by papers focused on Analytical Chemistry and Chromatography (7 papers), Mass Spectrometry Techniques and Applications (5 papers) and Analytical chemistry methods development (4 papers). Niklas Tyrefors collaborates with scholars based in Sweden and Japan. Niklas Tyrefors's co-authors include Bengt Långström, Curt Pettersson, Ingvar Johansson, Monika Johansson, Lena Ekman, L. Ekman, Yvonne Askemark, Mohamed Abdel‐Rehim, Margareta Bielenstein and Torbjörn Arvidsson and has published in prestigious journals such as Analytical Chemistry, Journal of Chromatography A and Analytical and Bioanalytical Chemistry.

In The Last Decade

Niklas Tyrefors

19 papers receiving 443 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Niklas Tyrefors Sweden	11	220	128	80	58	55	19	465
Hayat Lotfi France	12	152 0.7×	112 0.9×	95 1.2×	57 1.0×	62 1.1×	18	443
Fernando de Andrés Spain	20	149 0.7×	121 0.9×	45 0.6×	86 1.5×	165 3.0×	53	919
Manami Nishida Japan	13	241 1.1×	181 1.4×	115 1.4×	24 0.4×	76 1.4×	20	436
Eleanor I. Miller United States	8	146 0.7×	165 1.3×	88 1.1×	31 0.5×	121 2.2×	9	410
Akihiro Nakamoto Japan	13	318 1.4×	255 2.0×	242 3.0×	86 1.5×	139 2.5×	28	709
G. Casamenti Italy	12	209 0.9×	243 1.9×	27 0.3×	133 2.3×	44 0.8×	13	519
H. Tsoukali Greece	10	205 0.9×	169 1.3×	71 0.9×	14 0.2×	163 3.0×	20	472
Tohru Kojima Japan	14	285 1.3×	258 2.0×	187 2.3×	60 1.0×	97 1.8×	39	706
Robin Braithwaite United Kingdom	13	91 0.4×	69 0.5×	144 1.8×	206 3.6×	96 1.7×	20	642
Marcela Nogueira Rabelo Alves Brazil	7	103 0.5×	108 0.8×	109 1.4×	63 1.1×	54 1.0×	10	335

Countries citing papers authored by Niklas Tyrefors

Since Specialization

Citations

This map shows the geographic impact of Niklas Tyrefors's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Niklas Tyrefors with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Niklas Tyrefors more than expected).

Fields of papers citing papers by Niklas Tyrefors

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Niklas Tyrefors. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Niklas Tyrefors. The network helps show where Niklas Tyrefors may publish in the future.

Co-authorship network of co-authors of Niklas Tyrefors

This figure shows the co-authorship network connecting the top 25 collaborators of Niklas Tyrefors. A scholar is included among the top collaborators of Niklas Tyrefors based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Niklas Tyrefors. Niklas Tyrefors is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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19 of 19 papers shown

Tyrefors, Niklas, et al.. (2019). Acidic transformation of nordiazepam can affect recovery estimate during trace analysis of diazepam and nordiazepam in environmental water samples by liquid chromatography–tandem mass spectrometry. Analytical and Bioanalytical Chemistry. 411(17). 3919–3928. 2 indexed citations

Tyrefors, Niklas, Peter Michélsen, & Anders Grubb. (2014). 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. Scandinavian Journal of Clinical and Laboratory Investigation. 74(6). 546–554. 3 indexed citations

Tyrefors, Niklas, et al.. (2012). Chiral analysis of metoprolol and two of its metabolites, α-hydroxymetoprolol and deaminated metoprolol, in wastewater using liquid chromatography–tandem mass spectrometry. Journal of Chromatography A. 1269. 208–217. 36 indexed citations

Tyrefors, Niklas, et al.. (2012). Trace analysis of fluoxetine and its metabolite norfluoxetine. Part II: Enantioselective quantification and studies of matrix effects in raw and treated wastewater by solid phase extraction and liquid chromatography–tandem mass spectrometry. Journal of Chromatography A. 1227. 105–114. 35 indexed citations

Tyrefors, Niklas, et al.. (2011). Trace analysis of fluoxetine and its metabolite norfluoxetine. Part I: Development of a chiral liquid chromatography–tandem mass spectrometry method for wastewater samples. Journal of Chromatography A. 1218(33). 5587–5596. 38 indexed citations

Tyrefors, Niklas, et al.. (2004). Determination of fentanyl in human plasma and fentanyl and norfentanyl in human urine using LC–MS/MS. Journal of Pharmaceutical and Biomedical Analysis. 37(5). 1095–1100. 62 indexed citations

Abdel‐Rehim, Mohamed, Margareta Bielenstein, Yvonne Askemark, Niklas Tyrefors, & Torbjörn Arvidsson. (2000). High-performance liquid chromatography–tandem electrospray mass spectrometry for the determination of lidocaine and its metabolites in human plasma and urine. Journal of Chromatography B Biomedical Sciences and Applications. 741(2). 175–188. 59 indexed citations

Tyrefors, Niklas, et al.. (2000). Determination of raclopride in human plasma by on-column focusing packed capillary liquid chromatography–electrospray ionisation mass spectrometry. Journal of Chromatography B. 748(1). 189–195. 8 indexed citations

Tyrefors, Niklas, et al.. (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 specific radioactivity of radiopharmaceuticals. Journal of Pharmaceutical and Biomedical Analysis. 20(3). 493–501. 15 indexed citations

10.

Samskog, Jenny, et al.. (1999). Reversed-phase ion-pair chromatography coupled to electrospray ionisation mass spectrometry by on-line removal of the counter-ions. Journal of Chromatography A. 854(1-2). 155–162. 22 indexed citations

11.

Tyrefors, Niklas, et al.. (1999). Packed capillary column liquid chromatography coupled to mass spectrometry by a simple modification of an electrospray interface. Journal of Microcolumn Separations. 11(5). 353–358. 8 indexed citations

12.

Bergström, Mats, Eva Kumlien, Anders Lilja, et al.. (1998). Temporal lobe epilepsy visualized with PET with 11 C-L-deuterium-deprenyl - analysis of kinetic data. Acta Neurologica Scandinavica. 98(4). 224–231. 36 indexed citations

13.

Andersson, Yvonne, Niklas Tyrefors, Hirotaka Onoe, et al.. (1998). Synthesis of a 11C-labelled derivative of the N-methyl-D-aspartate receptor antagonist MK-801. Journal of Labelled Compounds and Radiopharmaceuticals. 41(6). 567–576. 6 indexed citations

14.

Tyrefors, Niklas, et al.. (1996). Determination of morphine, morphine-3-glucuronide and morphine-6-glucuronide in human serum by solid-phase extraction and liquid chromatography-mass spectrometry with electrospray ionisation. Journal of Chromatography A. 729(1-2). 279–285. 78 indexed citations

15.

Lindner, Karl‐Johan, et al.. (1996). Analysis of l-[methyl-11C]methionine and metabolites in human plasma by an automated solid-phase extraction and a high-performance liquid chromatographic procedure. Journal of Chromatography B Biomedical Sciences and Applications. 679(1-2). 13–19. 6 indexed citations

16.

Lindner, Karl‐Johan, et al.. (1995). An automated liquid chromatographic plasma analysis of amino acids used in combination with positron emission tomography (PET) for determination of in vivo plasma kinetics. Journal of Pharmaceutical and Biomedical Analysis. 13(4-5). 353–359. 9 indexed citations

17.

Tyrefors, Niklas. (1991). Temperature control of liquid chromatographic columns and enzyme reactors by using a proportional-integral-differential regulator in conjunction with a thermoelectric element. Analytical Chemistry. 63(17). 1901–1902. 4 indexed citations

18.

Tyrefors, Niklas & Anders Carlsson. (1990). Improvements in the separation and detection of acetylcholine and choline using liquid chromatography and electrochemical detection. Journal of Chromatography A. 502. 337–349. 20 indexed citations

19.

Tyrefors, Niklas, et al.. (1987). Determination of acetylcholine and choline in microdialysates from spinal cord of rat using liquid chromatography with electrochemical detection. Journal of Chromatography B Biomedical Sciences and Applications. 423. 85–91. 18 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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