Class information for:
Level 1: QUADRUPOLE ION TRAP//QUADRUPOLE MASS FILTER//RECTILINEAR ION TRAP

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
7112 1404 29.1 61%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
0 4 BIOCHEMISTRY & MOLECULAR BIOLOGY//CELL BIOLOGY//ONCOLOGY 4064930
157 3       JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY//BIOCHEMICAL RESEARCH METHODS//INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 61558
514 2             ORGANIC MASS SPECTROMETRY//INTERNATIONAL JOURNAL OF MASS SPECTROMETRY//JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 15151
7112 1                   QUADRUPOLE ION TRAP//QUADRUPOLE MASS FILTER//RECTILINEAR ION TRAP 1404

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 QUADRUPOLE ION TRAP authKW 1095560 7% 55% 92
2 QUADRUPOLE MASS FILTER authKW 362942 2% 76% 22
3 RECTILINEAR ION TRAP authKW 260966 1% 100% 12
4 RESONANCE EJECTION authKW 195724 1% 100% 9
5 SECULAR FREQUENCY authKW 195724 1% 100% 9
6 DIGITAL ION TRAP authKW 187953 1% 79% 11
7 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY journal 170465 16% 3% 227
8 ION TRAP authKW 168603 5% 11% 68
9 CYLINDRICAL ION TRAP authKW 167281 1% 77% 10
10 MASS FILTER authKW 164456 1% 69% 11

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 Spectroscopy 62043 57% 0% 803
2 Chemistry, Analytical 18648 49% 0% 690
3 Biochemical Research Methods 11683 31% 0% 430
4 Physics, Atomic, Molecular & Chemical 6069 26% 0% 372
5 Instruments & Instrumentation 574 7% 0% 100
6 Chemistry, Physical 468 15% 0% 210
7 Physics, Applied 180 10% 0% 145
8 Engineering, General 6 1% 0% 15
9 Nuclear Science & Technology 6 1% 0% 20
10 Materials Science, Coatings & Films 1 1% 0% 10

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 ANALYT RUMENTAT DEV 104513 2% 19% 25
2 GIPSE 65241 0% 100% 3
3 OPT SEMICOND DEVICE SECT 48930 0% 75% 3
4 EQUIPE IPCN 43494 0% 100% 2
5 SHANGHAI MOL CATALYSIS FUNCT MAT 39142 0% 60% 3
6 UAM1 28995 0% 67% 2
7 ADV COMP SYST TECHNOL GRP 21747 0% 100% 1
8 ARBEITSBEREICH MIKROSYSTEMTECH 21747 0% 100% 1
9 ATMOSPHER ENVIRONM SECUR POLLUT CONTROL EN 21747 0% 100% 1
10 BIOCHEM MASS SPE OCHEM OURCE 21747 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 170465 16% 3% 227
2 JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 156981 13% 4% 183
3 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES 93756 6% 6% 78
4 RAPID COMMUNICATIONS IN MASS SPECTROMETRY 79004 13% 2% 180
5 JOURNAL OF MASS SPECTROMETRY 17342 4% 2% 51
6 ANALYTICAL CHEMISTRY 16629 12% 0% 166
7 EUROPEAN JOURNAL OF MASS SPECTROMETRY 14022 2% 3% 25
8 MASS SPECTROMETRY REVIEWS 2488 1% 1% 9
9 ORGANIC MASS SPECTROMETRY 2325 1% 1% 15
10 FIELD ANALYTICAL CHEMISTRY AND TECHNOLOGY 1195 0% 2% 3

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 QUADRUPOLE ION TRAP 1095560 7% 55% 92 Search QUADRUPOLE+ION+TRAP Search QUADRUPOLE+ION+TRAP
2 QUADRUPOLE MASS FILTER 362942 2% 76% 22 Search QUADRUPOLE+MASS+FILTER Search QUADRUPOLE+MASS+FILTER
3 RECTILINEAR ION TRAP 260966 1% 100% 12 Search RECTILINEAR+ION+TRAP Search RECTILINEAR+ION+TRAP
4 RESONANCE EJECTION 195724 1% 100% 9 Search RESONANCE+EJECTION Search RESONANCE+EJECTION
5 SECULAR FREQUENCY 195724 1% 100% 9 Search SECULAR+FREQUENCY Search SECULAR+FREQUENCY
6 DIGITAL ION TRAP 187953 1% 79% 11 Search DIGITAL+ION+TRAP Search DIGITAL+ION+TRAP
7 ION TRAP 168603 5% 11% 68 Search ION+TRAP Search ION+TRAP
8 CYLINDRICAL ION TRAP 167281 1% 77% 10 Search CYLINDRICAL+ION+TRAP Search CYLINDRICAL+ION+TRAP
9 MASS FILTER 164456 1% 69% 11 Search MASS+FILTER Search MASS+FILTER
10 MINIATURE MASS SPECTROMETER 164456 1% 69% 11 Search MINIATURE+MASS+SPECTROMETER Search MINIATURE+MASS+SPECTROMETER

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref. in
cl.		 Shr. of ref. in
cl.		 Citations
1 SNYDER, DT , PULLIAM, CJ , OUYANG, Z , COOKS, RG , (2016) MINIATURE AND FIELDABLE MASS SPECTROMETERS: RECENT ADVANCES.ANALYTICAL CHEMISTRY. VOL. 88. ISSUE 1. P. 2 -29 117 50% 25
2 SNYDER, DT , PENG, WP , COOKS, RG , (2017) RESONANCE METHODS IN QUADRUPOLE ION TRAPS.CHEMICAL PHYSICS LETTERS. VOL. 668. ISSUE . P. 69 -89 160 75% 0
3 DOUGLAS, DJ , (2009) LINEAR QUADRUPOLES IN MASS SPECTROMETRY.MASS SPECTROMETRY REVIEWS. VOL. 28. ISSUE 6. P. 937 -960 75 74% 43
4 CHEUNG, K , VELASQUEZ-GARCIA, LF , AKINWANDE, AI , (2010) CHIP-SCALE QUADRUPOLE MASS FILTERS FOR PORTABLE MASS SPECTROMETRY.JOURNAL OF MICROELECTROMECHANICAL SYSTEMS. VOL. 19. ISSUE 3. P. 469 -483 59 94% 17
5 MARCH, RE , (2009) QUADRUPOLE ION TRAPS.MASS SPECTROMETRY REVIEWS. VOL. 28. ISSUE 6. P. 961 -989 65 71% 40
6 XIONG, CQ , ZHOU, XY , ZHANG, N , ZHAN, LP , CHEN, SM , NIE, ZX , (2014) NONLINEAR EFFECTS IN PAUL TRAPS OPERATED IN THE SECOND STABILITY REGION: ANALYTICAL ANALYSIS AND NUMERICAL VERIFICATION.JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY. VOL. 25. ISSUE 11. P. 1882 -1889 45 94% 1
7 OUYANG, Z , COOKS, RG , (2009) MINIATURE MASS SPECTROMETERS.ANNUAL REVIEW OF ANALYTICAL CHEMISTRY. VOL. 2. ISSUE . P. 187 -214 61 64% 70
8 SNYDER, DT , PULLIAM, CJ , WILEY, JS , DUNCAN, J , COOKS, RG , (2016) EXPERIMENTAL CHARACTERIZATION OF SECULAR FREQUENCY SCANNING IN ION TRAP MASS SPECTROMETERS.JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY. VOL. 27. ISSUE 7. P. 1243 -1255 39 98% 0
9 SNYDER, DT , PULLIAM, CJ , COOKS, RG , (2016) LINEAR MASS SCANS IN QUADRUPOLE ION TRAPS USING THE INVERSE MATHIEU Q SCAN.RAPID COMMUNICATIONS IN MASS SPECTROMETRY. VOL. 30. ISSUE 22. P. 2369 -2378 39 98% 0
10 HANSEN, BJ , NIEMI, RJ , HAWKINS, AR , LAMMERT, SA , AUSTIN, DE , (2013) A LITHOGRAPHICALLY PATTERNED DISCRETE PLANAR ELECTRODE LINEAR ION TRAP MASS SPECTROMETER.JOURNAL OF MICROELECTROMECHANICAL SYSTEMS. VOL. 22. ISSUE 4. P. 876-883 44 90% 3

Classes with closest relation at Level 1


Rank Class id link
1 22161 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES//ORGANIC MASS SPECTROMETRY//CARBON DISULFIDE ION
2 21296 ION MIRROR//MULTI TURN TIME OF FLIGHT MASS SPECTROMETER//REFLECTRON
3 10375 FT ICR//FTMS//ION CYCLOTRON ONANCE PROGRAM
4 14586 MEMBRANE INTRODUCTION MASS SPECTROMETRY//MEMBRANE EXTRACTION//SUPPORTED LIQUID MEMBRANE EXTRACTION
5 7355 ION ION REACTIONS//ELECTRON CAPTURE DISSOCIATION//ELECTRON TRANSFER DISSOCIATION
6 2485 TRAPPED IONS//ION TRAP//ULTRACOLD ATOMS
7 5783 SHEATHLESS INTERFACE//CE MS//CAPILLARY ELECTROPHORESIS MASS SPECTROMETRY
8 10153 ION NEUTRAL COMPLEX//PENTAQUADRUPOLE MASS SPECTROMETRY//ARENIUM IONS
9 10709 PEPTIDE FRAGMENTATION//PROTONATED PEPTIDES//JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
10 24319 ATMOSPHERIC PRESSURE PHOTOIONIZATION//ATMOSPHERIC PRESSURE LASER IONIZATION//APLI

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