European Journal of Mass Spectrometry

EJMS - European Journal of Mass Spectrometry, is a peer-reviewed journal, devoted to the publication of innovative research in mass spectrometry. Articles in the journal come from proteomics, metabolomics, petroleomics and other areas developing under the umbrella of the “omic revolution”. The scope of the journal covers applications of mass spectrometry in biology and medicine, ionisation in gas, liquid and solid phases, chemical reactions of ions in the gas phase, physics of ionic collisions, spectroscopy of ions, design and manufacture of mass spectrometers, applications of computers to mass spectrometry and applications of mass spectrometry to the environment and applications in the pharmaceutical industry. Topics of interest include experimental and theoretical studies of structures, energetics and reactions of gaseous ions, ion optical theories and ion optics in high vacuum and at higher pressures, ion formation from biological solids, elucidation of interactions and structures of biomolecules in condensed phases, mechanisms of ionic reactions, electrospray ionisation (ESI) and nano-electrospray ionisation, laser –stimulated ionisation and desorption of macromolecules in condensed phases, mass spectrometry of industrial organic and inorganic polymers, formation and reactions of reactions of clusters, reactions of ions at surfaces, multi-photon ionisation and dissociation, ion mobilityand related techniques, time-of-flight (ToF), Fourier transform ion cyclotron resonance (FT-ICR) and theories of ion formation, ion structure and dynamics of ion reactions.

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Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Category	Year	Quartile
Atomic and Molecular Physics, and Optics	1999	Q3
Atomic and Molecular Physics, and Optics	2000	Q2
Atomic and Molecular Physics, and Optics	2001	Q2
Atomic and Molecular Physics, and Optics	2002	Q2
Atomic and Molecular Physics, and Optics	2003	Q2
Atomic and Molecular Physics, and Optics	2004	Q3
Atomic and Molecular Physics, and Optics	2005	Q2
Atomic and Molecular Physics, and Optics	2006	Q2
Atomic and Molecular Physics, and Optics	2007	Q2
Atomic and Molecular Physics, and Optics	2008	Q2
Atomic and Molecular Physics, and Optics	2009	Q2
Atomic and Molecular Physics, and Optics	2010	Q2
Atomic and Molecular Physics, and Optics	2011	Q2
Atomic and Molecular Physics, and Optics	2012	Q2
Atomic and Molecular Physics, and Optics	2013	Q2
Atomic and Molecular Physics, and Optics	2014	Q3
Atomic and Molecular Physics, and Optics	2015	Q3
Atomic and Molecular Physics, and Optics	2016	Q2
Atomic and Molecular Physics, and Optics	2017	Q3
Atomic and Molecular Physics, and Optics	2018	Q3
Atomic and Molecular Physics, and Optics	2019	Q3
Atomic and Molecular Physics, and Optics	2020	Q3
Atomic and Molecular Physics, and Optics	2021	Q4
Atomic and Molecular Physics, and Optics	2022	Q3
Atomic and Molecular Physics, and Optics	2023	Q3
Medicine (miscellaneous)	1999	Q1
Medicine (miscellaneous)	2000	Q1
Medicine (miscellaneous)	2001	Q1
Medicine (miscellaneous)	2002	Q1
Medicine (miscellaneous)	2003	Q1
Medicine (miscellaneous)	2004	Q2
Medicine (miscellaneous)	2005	Q1
Medicine (miscellaneous)	2006	Q2
Medicine (miscellaneous)	2007	Q2
Medicine (miscellaneous)	2008	Q2
Medicine (miscellaneous)	2009	Q2
Medicine (miscellaneous)	2010	Q2
Medicine (miscellaneous)	2011	Q2
Medicine (miscellaneous)	2012	Q2
Medicine (miscellaneous)	2013	Q2
Medicine (miscellaneous)	2014	Q2
Medicine (miscellaneous)	2015	Q3
Medicine (miscellaneous)	2016	Q2
Medicine (miscellaneous)	2017	Q3
Medicine (miscellaneous)	2018	Q3
Medicine (miscellaneous)	2019	Q3
Medicine (miscellaneous)	2020	Q3
Medicine (miscellaneous)	2021	Q3
Medicine (miscellaneous)	2022	Q3
Medicine (miscellaneous)	2023	Q3
Spectroscopy	1999	Q3
Spectroscopy	2000	Q3
Spectroscopy	2001	Q2
Spectroscopy	2002	Q3
Spectroscopy	2003	Q3
Spectroscopy	2004	Q3
Spectroscopy	2005	Q3
Spectroscopy	2006	Q3
Spectroscopy	2007	Q3
Spectroscopy	2008	Q3
Spectroscopy	2009	Q3
Spectroscopy	2010	Q3
Spectroscopy	2011	Q3
Spectroscopy	2012	Q3
Spectroscopy	2013	Q3
Spectroscopy	2014	Q3
Spectroscopy	2015	Q3
Spectroscopy	2016	Q2
Spectroscopy	2017	Q3
Spectroscopy	2018	Q3
Spectroscopy	2019	Q4
Spectroscopy	2020	Q4
Spectroscopy	2021	Q4
Spectroscopy	2022	Q4
Spectroscopy	2023	Q3

SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Year	SJR
1999	0.477
2000	0.552
2001	0.630
2002	0.497
2003	0.543
2004	0.443
2005	0.604
2006	0.635
2007	0.570
2008	0.543
2009	0.484
2010	0.610
2011	0.551
2012	0.560
2013	0.566
2014	0.441
2015	0.381
2016	0.542
2017	0.369
2018	0.377
2019	0.280
2020	0.299
2021	0.265
2022	0.265
2023	0.311

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Year	Documents
1999	59
2000	63
2001	54
2002	55
2003	59
2004	104
2005	65
2006	45
2007	62
2008	48
2009	75
2010	69
2011	52
2012	48
2013	42
2014	51
2015	90
2016	41
2017	61
2018	49
2019	50
2020	40
2021	25
2022	14
2023	37

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per document	Year	Value
Cites / Doc. (4 years)	1999	0.891
Cites / Doc. (4 years)	2000	0.888
Cites / Doc. (4 years)	2001	1.080
Cites / Doc. (4 years)	2002	1.190
Cites / Doc. (4 years)	2003	1.199
Cites / Doc. (4 years)	2004	1.104
Cites / Doc. (4 years)	2005	1.331
Cites / Doc. (4 years)	2006	1.442
Cites / Doc. (4 years)	2007	1.260
Cites / Doc. (4 years)	2008	1.264
Cites / Doc. (4 years)	2009	1.227
Cites / Doc. (4 years)	2010	1.100
Cites / Doc. (4 years)	2011	1.236
Cites / Doc. (4 years)	2012	1.217
Cites / Doc. (4 years)	2013	1.328
Cites / Doc. (4 years)	2014	1.057
Cites / Doc. (4 years)	2015	1.244
Cites / Doc. (4 years)	2016	1.043
Cites / Doc. (4 years)	2017	0.915
Cites / Doc. (4 years)	2018	0.909
Cites / Doc. (4 years)	2019	1.017
Cites / Doc. (4 years)	2020	0.856
Cites / Doc. (4 years)	2021	1.190
Cites / Doc. (4 years)	2022	1.049
Cites / Doc. (4 years)	2023	1.186
Cites / Doc. (3 years)	1999	0.891
Cites / Doc. (3 years)	2000	0.901
Cites / Doc. (3 years)	2001	1.090
Cites / Doc. (3 years)	2002	1.165
Cites / Doc. (3 years)	2003	1.227
Cites / Doc. (3 years)	2004	1.125
Cites / Doc. (3 years)	2005	1.408
Cites / Doc. (3 years)	2006	1.496
Cites / Doc. (3 years)	2007	1.285
Cites / Doc. (3 years)	2008	1.285
Cites / Doc. (3 years)	2009	1.148
Cites / Doc. (3 years)	2010	1.222
Cites / Doc. (3 years)	2011	1.234
Cites / Doc. (3 years)	2012	1.240
Cites / Doc. (3 years)	2013	1.367
Cites / Doc. (3 years)	2014	1.113
Cites / Doc. (3 years)	2015	1.135
Cites / Doc. (3 years)	2016	1.027
Cites / Doc. (3 years)	2017	0.934
Cites / Doc. (3 years)	2018	0.964
Cites / Doc. (3 years)	2019	1.053
Cites / Doc. (3 years)	2020	0.906
Cites / Doc. (3 years)	2021	1.237
Cites / Doc. (3 years)	2022	1.000
Cites / Doc. (3 years)	2023	1.494
Cites / Doc. (2 years)	1999	0.873
Cites / Doc. (2 years)	2000	0.817
Cites / Doc. (2 years)	2001	1.033
Cites / Doc. (2 years)	2002	1.205
Cites / Doc. (2 years)	2003	1.110
Cites / Doc. (2 years)	2004	1.211
Cites / Doc. (2 years)	2005	1.276
Cites / Doc. (2 years)	2006	1.509
Cites / Doc. (2 years)	2007	1.227
Cites / Doc. (2 years)	2008	1.234
Cites / Doc. (2 years)	2009	1.227
Cites / Doc. (2 years)	2010	1.211
Cites / Doc. (2 years)	2011	1.222
Cites / Doc. (2 years)	2012	1.355
Cites / Doc. (2 years)	2013	1.300
Cites / Doc. (2 years)	2014	1.011
Cites / Doc. (2 years)	2015	1.086
Cites / Doc. (2 years)	2016	1.071
Cites / Doc. (2 years)	2017	0.954
Cites / Doc. (2 years)	2018	0.814
Cites / Doc. (2 years)	2019	1.182
Cites / Doc. (2 years)	2020	0.859
Cites / Doc. (2 years)	2021	1.222
Cites / Doc. (2 years)	2022	1.231
Cites / Doc. (2 years)	2023	1.231

Total Cites

Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Cites	Year	Value
Self Cites	1999	14
Self Cites	2000	6
Self Cites	2001	11
Self Cites	2002	19
Self Cites	2003	22
Self Cites	2004	15
Self Cites	2005	27
Self Cites	2006	29
Self Cites	2007	13
Self Cites	2008	15
Self Cites	2009	14
Self Cites	2010	15
Self Cites	2011	14
Self Cites	2012	12
Self Cites	2013	21
Self Cites	2014	8
Self Cites	2015	14
Self Cites	2016	33
Self Cites	2017	24
Self Cites	2018	13
Self Cites	2019	7
Self Cites	2020	4
Self Cites	2021	2
Self Cites	2022	3
Self Cites	2023	11
Total Cites	1999	122
Total Cites	2000	145
Total Cites	2001	194
Total Cites	2002	205
Total Cites	2003	211
Total Cites	2004	189
Total Cites	2005	307
Total Cites	2006	341
Total Cites	2007	275
Total Cites	2008	221
Total Cites	2009	178
Total Cites	2010	226
Total Cites	2011	237
Total Cites	2012	243
Total Cites	2013	231
Total Cites	2014	158
Total Cites	2015	160
Total Cites	2016	188
Total Cites	2017	170
Total Cites	2018	185
Total Cites	2019	159
Total Cites	2020	145
Total Cites	2021	172
Total Cites	2022	115
Total Cites	2023	118

External Cites per Doc

Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

Cites	Year	Value
External Cites per document	1999	0.788
External Cites per document	2000	0.863
External Cites per document	2001	1.028
External Cites per document	2002	1.057
External Cites per document	2003	1.099
External Cites per document	2004	1.036
External Cites per document	2005	1.284
External Cites per document	2006	1.368
External Cites per document	2007	1.224
External Cites per document	2008	1.198
External Cites per document	2009	1.058
External Cites per document	2010	1.141
External Cites per document	2011	1.161
External Cites per document	2012	1.179
External Cites per document	2013	1.243
External Cites per document	2014	1.056
External Cites per document	2015	1.035
External Cites per document	2016	0.847
External Cites per document	2017	0.802
External Cites per document	2018	0.896
External Cites per document	2019	1.007
External Cites per document	2020	0.881
External Cites per document	2021	1.223
External Cites per document	2022	0.974
External Cites per document	2023	1.354
Cites per document	1999	0.891
Cites per document	2000	0.901
Cites per document	2001	1.090
Cites per document	2002	1.165
Cites per document	2003	1.227
Cites per document	2004	1.125
Cites per document	2005	1.408
Cites per document	2006	1.496
Cites per document	2007	1.285
Cites per document	2008	1.285
Cites per document	2009	1.148
Cites per document	2010	1.222
Cites per document	2011	1.234
Cites per document	2012	1.240
Cites per document	2013	1.367
Cites per document	2014	1.113
Cites per document	2015	1.135
Cites per document	2016	1.027
Cites per document	2017	0.934
Cites per document	2018	0.964
Cites per document	2019	1.053
Cites per document	2020	0.906
Cites per document	2021	1.237
Cites per document	2022	1.000
Cites per document	2023	1.494

% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

Year	International Collaboration
1999	16.95
2000	25.40
2001	18.52
2002	10.91
2003	40.68
2004	25.96
2005	27.69
2006	24.44
2007	24.19
2008	16.67
2009	28.00
2010	27.54
2011	15.38
2012	31.25
2013	19.05
2014	27.45
2015	31.11
2016	14.63
2017	14.75
2018	16.33
2019	22.00
2020	10.00
2021	12.00
2022	0.00
2023	16.22

Citable documents

Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Documents	Year	Value
Non-citable documents	1999	0
Non-citable documents	2000	0
Non-citable documents	2001	0
Non-citable documents	2002	0
Non-citable documents	2003	1
Non-citable documents	2004	3
Non-citable documents	2005	4
Non-citable documents	2006	3
Non-citable documents	2007	2
Non-citable documents	2008	6
Non-citable documents	2009	7
Non-citable documents	2010	7
Non-citable documents	2011	4
Non-citable documents	2012	5
Non-citable documents	2013	5
Non-citable documents	2014	3
Non-citable documents	2015	2
Non-citable documents	2016	5
Non-citable documents	2017	7
Non-citable documents	2018	14
Non-citable documents	2019	10
Non-citable documents	2020	16
Non-citable documents	2021	13
Non-citable documents	2022	14
Non-citable documents	2023	6
Citable documents	1999	137
Citable documents	2000	161
Citable documents	2001	178
Citable documents	2002	176
Citable documents	2003	171
Citable documents	2004	165
Citable documents	2005	214
Citable documents	2006	225
Citable documents	2007	212
Citable documents	2008	166
Citable documents	2009	148
Citable documents	2010	178
Citable documents	2011	188
Citable documents	2012	191
Citable documents	2013	164
Citable documents	2014	139
Citable documents	2015	139
Citable documents	2016	178
Citable documents	2017	175
Citable documents	2018	178
Citable documents	2019	141
Citable documents	2020	144
Citable documents	2021	126
Citable documents	2022	101
Citable documents	2023	73

Cited documents

Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Documents	Year	Value
Uncited documents	1999	79
Uncited documents	2000	85
Uncited documents	2001	81
Uncited documents	2002	80
Uncited documents	2003	79
Uncited documents	2004	77
Uncited documents	2005	99
Uncited documents	2006	91
Uncited documents	2007	88
Uncited documents	2008	81
Uncited documents	2009	79
Uncited documents	2010	90
Uncited documents	2011	99
Uncited documents	2012	94
Uncited documents	2013	80
Uncited documents	2014	70
Uncited documents	2015	68
Uncited documents	2016	90
Uncited documents	2017	95
Uncited documents	2018	90
Uncited documents	2019	75
Uncited documents	2020	82
Uncited documents	2021	65
Uncited documents	2022	57
Uncited documents	2023	30
Cited documents	1999	58
Cited documents	2000	76
Cited documents	2001	97
Cited documents	2002	96
Cited documents	2003	93
Cited documents	2004	91
Cited documents	2005	119
Cited documents	2006	137
Cited documents	2007	126
Cited documents	2008	91
Cited documents	2009	76
Cited documents	2010	95
Cited documents	2011	93
Cited documents	2012	102
Cited documents	2013	89
Cited documents	2014	72
Cited documents	2015	73
Cited documents	2016	93
Cited documents	2017	87
Cited documents	2018	102
Cited documents	2019	76
Cited documents	2020	78
Cited documents	2021	74
Cited documents	2022	58
Cited documents	2023	49