Marja Ojala

792 total citations
16 papers, 613 citations indexed

About

Marja Ojala is a scholar working on Spectroscopy, Biomedical Engineering and Analytical Chemistry. According to data from OpenAlex, Marja Ojala has authored 16 papers receiving a total of 613 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Spectroscopy, 8 papers in Biomedical Engineering and 7 papers in Analytical Chemistry. Recurrent topics in Marja Ojala's work include Advanced Chemical Sensor Technologies (7 papers), Mass Spectrometry Techniques and Applications (7 papers) and Analytical chemistry methods development (6 papers). Marja Ojala is often cited by papers focused on Advanced Chemical Sensor Technologies (7 papers), Mass Spectrometry Techniques and Applications (7 papers) and Analytical chemistry methods development (6 papers). Marja Ojala collaborates with scholars based in Finland and United Kingdom. Marja Ojala's co-authors include Raimo A. Ketola, Tapio Kotiaho, Gary Williamson, Kirsi‐Marja Oksman‐Caldentey, Anna‐Marja Aura, Kaisa Poutanen, Michael Bailey, Karen O’Leary, Risto Kostiainen and Anna Maria Nuutila and has published in prestigious journals such as Analytical Chemistry, Journal of Agricultural and Food Chemistry and Analytica Chimica Acta.

In The Last Decade

Marja Ojala

15 papers receiving 583 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Marja Ojala Finland	13	183	178	167	145	140	16	613
F. Coccioli Italy	19	168 0.9×	199 1.1×	230 1.4×	244 1.7×	165 1.2×	38	911
Lea Lojková Czechia	15	142 0.8×	181 1.0×	219 1.3×	110 0.8×	85 0.6×	29	806
Q Lang United States	4	90 0.5×	112 0.6×	108 0.6×	107 0.7×	206 1.5×	4	637
Carine Viana Brazil	18	202 1.1×	98 0.6×	155 0.9×	88 0.6×	96 0.7×	56	792
M.M. Delgado-Zamarreño Spain	14	104 0.6×	149 0.8×	112 0.7×	205 1.4×	117 0.8×	22	559
Jeanice B. Thomas United States	18	162 0.9×	141 0.8×	166 1.0×	292 2.0×	77 0.6×	33	789
J. Alary France	12	76 0.4×	118 0.7×	152 0.9×	97 0.7×	77 0.6×	71	678
Karel Hrnčiřík Netherlands	15	257 1.4×	172 1.0×	157 0.9×	168 1.2×	180 1.3×	19	848
M.M Jiménez-Carmona Spain	15	199 1.1×	229 1.3×	121 0.7×	67 0.5×	207 1.5×	16	696
Shao-Hua Zhu China	15	317 1.7×	176 1.0×	103 0.6×	96 0.7×	50 0.4×	27	700

Countries citing papers authored by Marja Ojala

Since Specialization

Citations

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

Fields of papers citing papers by Marja Ojala

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Marja Ojala. 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 Marja Ojala. The network helps show where Marja Ojala may publish in the future.

Co-authorship network of co-authors of Marja Ojala

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

All Works

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16 of 16 papers shown

Aura, Anna‐Marja, Karen O’Leary, Gary Williamson, et al.. (2002). Quercetin Derivatives Are Deconjugated and Converted to Hydroxyphenylacetic Acids but Not Methylated by Human Fecal Flora in Vitro. Journal of Agricultural and Food Chemistry. 50(6). 1725–1730. 247 indexed citations

Ojala, Marja, et al.. (2001). Purge-and-Membrane Mass Spectrometry, A Screening Method for Analysis of VOCs from Soil Samples. Analytical Chemistry. 73(15). 3624–3631. 17 indexed citations

Ojala, Marja, Matti Poutanen, Ismo Mattila, et al.. (2000). Analysis of residual solvents in pharmaceuticals with purge-and-membrane mass spectrometry. Rapid Communications in Mass Spectrometry. 14(11). 994–998. 9 indexed citations

Ojala, Marja, et al.. (1999). A new purge-and-membrane mass spectrometric (PAM-MS) instrument for analysis of volatile organic compounds in soil samples. The Analyst. 124(10). 1421–1424. 17 indexed citations

Ketola, Raimo A., et al.. (1999). A non-linear asymmetric error function-based least mean square approach for the analysis of multicomponent mass spectra measured by membrane inlet mass spectrometry. Rapid Communications in Mass Spectrometry. 13(8). 654–662. 13 indexed citations

Kostiainen, Risto, et al.. (1998). Analysis of Volatile Organic Compounds in Water and Soil Samples by Purge-and-Membrane Mass Spectrometry. Analytical Chemistry. 70(14). 3028–3032. 35 indexed citations

Ojala, Marja. (1997). Determination of phenolic compounds in water using membrane inlet mass spectrometry. Talanta. 44(7). 1253–1259. 18 indexed citations

Ojala, Marja, et al.. (1997). Detection of volatile organic sulfur compounds in water by headspace gas chromatography and membrane inlet mass spectrometry. Journal of High Resolution Chromatography. 20(3). 165–169. 22 indexed citations

Ketola, Raimo A., et al.. (1997). Analysis of Volatile Organic Sulfur Compounds in Air by Membrane Inlet Mass Spectrometry. Analytical Chemistry. 69(22). 4536–4539. 27 indexed citations

10.

Kotiaho, Tapio, et al.. (1997). Membrane inlet mass spectrometry in environmental analysis. 19–21.

11.

Ketola, Raimo A., et al.. (1997). Development of a membrane inlet mass spectrometric method for analysis of air samples. Analytica Chimica Acta. 349(1-3). 359–365. 38 indexed citations

12.

Ketola, Raimo A., et al.. (1995). On-Site Environmental Analysis by Membrane Inlet Mass Spectrometry. Analytical Chemistry. 67(8). 1421–1425. 52 indexed citations

13.

Ojala, Marja. (1994). Analysis of aldehydes and ketones from beer as O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine derivatives. Talanta. 41(8). 1297–1309. 42 indexed citations

14.

Ojala, Marja. (1993). Simultaneous separation and determination of chlorobenzenes, PCBs, and chlorophenols using silica gel fractionation and GC‐ECD analysis. Journal of High Resolution Chromatography. 16(11). 679–682. 8 indexed citations

15.

Toivonen, Leena, Marja Ojala, & Veli Kauppinen. (1991). Studies on the optimization of growth and indole alkaloid production by hairy root cultures of Catharanthus roseus. Biotechnology and Bioengineering. 37(7). 673–680. 42 indexed citations

16.

Toivonen, Leena, Marja Ojala, & Veli Kauppinen. (1990). Indole alkaloid production by hairy root cultures ofCatharanthus roseus: Growth kinetics and fermentation. Biotechnology Letters. 12(7). 519–524. 26 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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