Iván Álvarez-Freire

809 total citations
39 papers, 628 citations indexed

About

Iván Álvarez-Freire is a scholar working on Toxicology, Spectroscopy and Analytical Chemistry. According to data from OpenAlex, Iván Álvarez-Freire has authored 39 papers receiving a total of 628 indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Toxicology, 19 papers in Spectroscopy and 14 papers in Analytical Chemistry. Recurrent topics in Iván Álvarez-Freire's work include Forensic Toxicology and Drug Analysis (27 papers), Analytical Chemistry and Chromatography (14 papers) and Analytical chemistry methods development (9 papers). Iván Álvarez-Freire is often cited by papers focused on Forensic Toxicology and Drug Analysis (27 papers), Analytical Chemistry and Chromatography (14 papers) and Analytical chemistry methods development (9 papers). Iván Álvarez-Freire collaborates with scholars based in Spain, Italy and United Kingdom. Iván Álvarez-Freire's co-authors include María Jesús Tabernero, Ana María Bermejo, Pamela Cabarcos, Purificación Fernández, Patricia López, Pilar Fernández Fernández, R.A. Lorenzo, P. López, Antonia M. Carro and Pilar Fernández Hernando and has published in prestigious journals such as Journal of Chromatography A, Molecules and Analytical and Bioanalytical Chemistry.

In The Last Decade

Iván Álvarez-Freire

37 papers receiving 598 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Iván Álvarez-Freire Spain 16 310 229 216 133 129 39 628
Solfrid Hegstad Norway 16 237 0.8× 166 0.7× 143 0.7× 108 0.8× 63 0.5× 33 695
Pamela Cabarcos Spain 14 224 0.7× 153 0.7× 150 0.7× 102 0.8× 126 1.0× 18 463
C. Jurado Spain 13 535 1.7× 232 1.0× 127 0.6× 142 1.1× 163 1.3× 31 943
Sieglinde Herre Germany 11 361 1.2× 200 0.9× 72 0.3× 229 1.7× 184 1.4× 22 707
Jörg Teske Germany 15 273 0.9× 197 0.9× 132 0.6× 96 0.7× 72 0.6× 37 678
Jin Young Kim South Korea 16 342 1.1× 168 0.7× 109 0.5× 134 1.0× 76 0.6× 53 681
Marie Katrine Klose Nielsen Denmark 16 479 1.5× 168 0.7× 81 0.4× 147 1.1× 87 0.7× 33 693
Nadia Fucci Italy 18 403 1.3× 198 0.9× 137 0.6× 125 0.9× 53 0.4× 51 854
Susanna Vogliardi Italy 16 357 1.2× 198 0.9× 66 0.3× 160 1.2× 74 0.6× 31 634
Rolf Aderjan Germany 18 325 1.0× 183 0.8× 92 0.4× 190 1.4× 289 2.2× 36 876

Countries citing papers authored by Iván Álvarez-Freire

Since Specialization
Citations

This map shows the geographic impact of Iván Álvarez-Freire'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 Iván Álvarez-Freire with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Iván Álvarez-Freire more than expected).

Fields of papers citing papers by Iván Álvarez-Freire

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Iván Álvarez-Freire. 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 Iván Álvarez-Freire. The network helps show where Iván Álvarez-Freire may publish in the future.

Co-authorship network of co-authors of Iván Álvarez-Freire

This figure shows the co-authorship network connecting the top 25 collaborators of Iván Álvarez-Freire. A scholar is included among the top collaborators of Iván Álvarez-Freire 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 Iván Álvarez-Freire. Iván Álvarez-Freire is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Herbello-Hermelo, Paloma, Iván Álvarez-Freire, María Jesús Tabernero, et al.. (2025). Impact of coca leaf flour candy consumption on cocaine and benzoylecgonine levels: The role of hygrine and cuscohygrine in distinguishing licit from illicit cocaine use. Forensic Science International. 371. 112494–112494. 1 indexed citations
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Álvarez-Freire, Iván, Antonio Moreda–Piñeiro, María Jesús Tabernero, et al.. (2023). Detection of coca alkaloids in oral fluid from coca leaf (tea) consumers: using solid phase extraction to improve validation parameters and widen the detection window. Analytical Methods. 15(45). 6177–6183. 3 indexed citations
6.
Álvarez-Freire, Iván, et al.. (2023). Simple Method for the Determination of THC and THC-COOH in Human Postmortem Blood Samples by Gas Chromatography—Mass Spectrometry. Molecules. 28(8). 3586–3586. 6 indexed citations
7.
Álvarez-Freire, Iván, et al.. (2023). Statistical Analysis of Toxicological Data of Victims of Traffic Accidents in Galicia (Spain). Prevention Science. 24(4). 765–773. 5 indexed citations
8.
Álvarez-Freire, Iván, et al.. (2022). Quantitative determination of clozapine in plasma using an environmentally friendly technique. Microchemical Journal. 180. 107612–107612. 7 indexed citations
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Whalen, Kristen E., Iván Álvarez-Freire, Maya Beganovic, et al.. (2021). Identification of a bacteria-produced benzisoxazole with antibiotic activity against multi-drug resistant Acinetobacter baumannii. The Journal of Antibiotics. 74(6). 370–380. 9 indexed citations
11.
Álvarez-Freire, Iván, et al.. (2018). Determination of benzodiazepines in pericardial fluid by gas chromatography–mass spectrometry. Journal of Pharmaceutical and Biomedical Analysis. 159. 45–52. 20 indexed citations
12.
Cabarcos, Pamela, Paloma Herbello-Hermelo, Iván Álvarez-Freire, et al.. (2016). Solid phase microextraction and gas chromatography–mass spectrometry methods for residual solvent assessment in seized cocaine and heroin. Analytical and Bioanalytical Chemistry. 408(23). 6393–6402. 6 indexed citations
13.
Cabarcos, Pamela, Iván Álvarez-Freire, María Jesús Tabernero, & Ana María Bermejo. (2015). Determination of direct alcohol markers: a review. Analytical and Bioanalytical Chemistry. 407(17). 4907–4925. 72 indexed citations
14.
Cabarcos, Pamela, et al.. (2012). A new method for quantifying prenatal exposure to ethanol by microwave-assisted extraction (MAE) of meconium followed by gas chromatography–mass spectrometry (GC–MS). Analytical and Bioanalytical Chemistry. 404(1). 147–155. 13 indexed citations
15.
Rossi, Sabina Strano, Iván Álvarez-Freire, María Jesús Tabernero, et al.. (2010). Determination of fentanyl, metabolite and analogs in urine by GC/MS. Journal of Applied Toxicology. 31(7). 649–654. 36 indexed citations
16.
López, P., Ana María Bermejo, María Jesús Tabernero, et al.. (2009). Cocaine and Opiates Use in Pregnancy: Detection of Drugs in Neonatal Meconium and Urine. Journal of Analytical Toxicology. 33(7). 351–355. 18 indexed citations
17.
Álvarez-Freire, Iván, et al.. (2008). Microwave assisted extraction for the determination of ethyl glucuronide in urine by gas chromatography‐mass spectrometry. Journal of Applied Toxicology. 28(6). 773–778. 20 indexed citations
18.
Álvarez-Freire, Iván, Ana María Bermejo, María Jesús Tabernero, et al.. (2008). Microwave-assisted extraction: a simpler and faster method for the determination of ethyl glucuronide in hair by gas chromatography–mass spectrometry. Analytical and Bioanalytical Chemistry. 393(4). 1345–1350. 34 indexed citations
19.
López, P., Ana María Bermejo, María Jesús Tabernero, Pilar Fernández Fernández, & Iván Álvarez-Freire. (2007). Determination of cocaine and heroin with their respective metabolites in meconium by gas chromatography‐mass spectrometry. Journal of Applied Toxicology. 27(5). 464–471. 20 indexed citations
20.
Bermejo, Ana María, Patricia López, Iván Álvarez-Freire, María Jesús Tabernero, & Purificación Fernández. (2005). Solid-phase microextraction for the determination of cocaine and cocaethylene in human hair by gas chromatography–mass spectrometry. Forensic Science International. 156(1). 2–8. 45 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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