Class information for:
Level 1: FORMALDEHYDE//2 4 DINITROPHENYLHYDRAZINE//FORMALDEHYDE DETERMINATION

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
5612 1597 27.5 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
4 4 ENVIRONMENTAL SCIENCES//GEOSCIENCES, MULTIDISCIPLINARY//METEOROLOGY & ATMOSPHERIC SCIENCES 1766162
108 3       AIR POLLUTION//TOXICOLOGY//PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH 71534
1579 2             ISOPRENE//BIOGENIC EMISSIONS//VOLATILE ORGANIC COMPOUNDS 7259
5612 1                   FORMALDEHYDE//2 4 DINITROPHENYLHYDRAZINE//FORMALDEHYDE DETERMINATION 1597

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 FORMALDEHYDE authKW 784893 24% 11% 383
2 2 4 DINITROPHENYLHYDRAZINE authKW 364258 3% 39% 49
3 FORMALDEHYDE DETERMINATION authKW 286781 1% 100% 15
4 CARBONYL COMPOUNDS authKW 220042 7% 10% 115
5 DNPH authKW 152934 1% 50% 16
6 CARBONYLS authKW 127073 3% 14% 49
7 FLUORAL P authKW 122357 1% 80% 8
8 PFBHA authKW 96781 1% 56% 9
9 ABT ANALYT CHEM address 96066 1% 36% 14
10 FORMALDEHYDE IN AIR authKW 95594 0% 100% 5

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 Chemistry, Analytical 21388 49% 0% 788
2 Environmental Sciences 4841 27% 0% 438
3 Meteorology & Atmospheric Sciences 3285 13% 0% 212
4 Biochemical Research Methods 2088 13% 0% 204
5 Engineering, Environmental 1126 7% 0% 115
6 Food Science & Technology 206 5% 0% 84
7 BIOLOGY, MISCELLANEOUS 191 0% 0% 4
8 Electrochemistry 176 3% 0% 55
9 Instruments & Instrumentation 142 4% 0% 61
10 Spectroscopy 81 3% 0% 42

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 ABT ANALYT CHEM 96066 1% 36% 14
2 BRANCH CAMPUS BIOTECHNOL 38237 0% 100% 2
3 GD UTILIZAT PROTECT ENVIRONM OURCES 38237 0% 100% 2
4 SCI TECHNOL TRANSFER 38237 0% 100% 2
5 UPR 5151 38237 0% 100% 2
6 JOINT PROGRAM EXPOSURE ASSESSMENT 38233 0% 50% 4
7 CELL REGULATORY SYST 34134 0% 36% 5
8 GUANGZHOU ENVIRONM PROTECT OURCES UT 25490 0% 67% 2
9 JOINT PROGRAM EXPOSURE SCI 25490 0% 67% 2
10 ADV MAT ENERGY ENVIRONM SYST 19119 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 ATMOSPHERIC ENVIRONMENT 9814 6% 1% 94
2 AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 7235 2% 1% 30
3 JOURNAL OF CHROMATOGRAPHY A 5025 5% 0% 85
4 INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY 4552 2% 1% 28
5 TALANTA 4039 4% 0% 60
6 ANALYTICA CHIMICA ACTA 3251 4% 0% 65
7 ANALYST 2468 3% 0% 44
8 ENVIRONMENTAL SCIENCE & TECHNOLOGY 2426 4% 0% 61
9 CHROMATOGRAPHIA 2373 2% 0% 33
10 JOURNAL OF ENVIRONMENTAL MONITORING 2137 1% 1% 17

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 FORMALDEHYDE 784893 24% 11% 383 Search FORMALDEHYDE Search FORMALDEHYDE
2 2 4 DINITROPHENYLHYDRAZINE 364258 3% 39% 49 Search 2+4+DINITROPHENYLHYDRAZINE Search 2+4+DINITROPHENYLHYDRAZINE
3 FORMALDEHYDE DETERMINATION 286781 1% 100% 15 Search FORMALDEHYDE+DETERMINATION Search FORMALDEHYDE+DETERMINATION
4 CARBONYL COMPOUNDS 220042 7% 10% 115 Search CARBONYL+COMPOUNDS Search CARBONYL+COMPOUNDS
5 DNPH 152934 1% 50% 16 Search DNPH Search DNPH
6 CARBONYLS 127073 3% 14% 49 Search CARBONYLS Search CARBONYLS
7 FLUORAL P 122357 1% 80% 8 Search FLUORAL+P Search FLUORAL+P
8 PFBHA 96781 1% 56% 9 Search PFBHA Search PFBHA
9 FORMALDEHYDE IN AIR 95594 0% 100% 5 Search FORMALDEHYDE+IN+AIR Search FORMALDEHYDE+IN+AIR
10 FORMALDEHYDE DETECTION 93678 0% 70% 7 Search FORMALDEHYDE+DETECTION Search FORMALDEHYDE+DETECTION

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 VOGEL, M , BULDT, A , KARST, U , (2000) HYDRAZINE REAGENTS AS DERIVATIZING AGENTS IN ENVIRONMENTAL ANALYSIS - A CRITICAL REVIEW.FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY. VOL. 366. ISSUE 8. P. 781 -791 83 83% 100
2 SZULEJKO, JE , KIM, KH , (2015) DERIVATIZATION TECHNIQUES FOR DETERMINATION OF CARBONYLS IN AIR.TRAC-TRENDS IN ANALYTICAL CHEMISTRY. VOL. 64. ISSUE . P. 29 -41 65 64% 6
3 TANG, JH , WANG, XM , SHENG, GY , FU, JM , (2005) THE PROGRESS OF THE ANALYSIS OF FORMALDEHYDE AND OTHER CARBONYLS IN ATMOSPHERE.CHINESE JOURNAL OF ANALYTICAL CHEMISTRY. VOL. 33. ISSUE 1. P. 134-140 50 88% 3
4 GUO, SJ , CHEN, M , TAN, JH , (2016) SEASONAL AND DIURNAL CHARACTERISTICS OF ATMOSPHERIC CARBONYLS IN NANNING, CHINA.ATMOSPHERIC RESEARCH. VOL. 169. ISSUE . P. 46 -53 41 68% 2
5 MOTYKA, K , MIKUSKA, P , (2005) A SURVEY OF METHODS FOR DETERMINATION OF FORMALDEHYDE AND OTHER CARBONYL COMPOUNDS IN ATMOSPHERE.CHEMICKE LISTY. VOL. 99. ISSUE 1. P. 13-20 50 83% 7
6 HUANG, J , FENG, YL , LI, J , XIONG, B , FENG, JL , WEN, S , SHENG, GY , FU, JM , WU, MH , (2008) CHARACTERISTICS OF CARBONYL COMPOUNDS IN AMBIENT AIR OF SHANGHAI, CHINA.JOURNAL OF ATMOSPHERIC CHEMISTRY. VOL. 61. ISSUE 1. P. 1 -20 49 71% 21
7 HERRINGTON, J , ZHANG, L , WHITAKER, D , SHELDON, L , ZHANG, J , (2005) OPTIMIZING A DANSYLHYDRAZINE (DNSH) BASED METHOD FOR MEASURING AIRBORNE ACROLEIN AND OTHER UNSATURATED CARBONYLS.JOURNAL OF ENVIRONMENTAL MONITORING. VOL. 7. ISSUE 10. P. 969-976 40 98% 8
8 GUO, SJ , CHEN, M , HE, XL , YANG, WW , TAN, JH , (2014) SEASONAL AND DIURNAL CHARACTERISTICS OF CARBONYLS IN URBAN AIR IN QINZHOU, CHINA.AEROSOL AND AIR QUALITY RESEARCH. VOL. 14. ISSUE 6. P. 1653 -1664 42 69% 3
9 ZHAO, JC , WANG, GL , CAO, T , GUO, Z , (2016) DEVELOPMENT OF A NOVEL DERIVATE ASSAY FOR FORMALDEHYDE DETERMINATION BY HPLC IN BEER SAMPLES.FOOD ANALYTICAL METHODS. VOL. 9. ISSUE 1. P. 156 -163 27 96% 1
10 VAIRAVAMURTHY, A , ROBERTS, JM , NEWMAN, L , (1992) METHODS FOR DETERMINATION OF LOW-MOLECULAR-WEIGHT CARBONYL-COMPOUNDS IN THE ATMOSPHERE.ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS. VOL. 26. ISSUE 11. P. 1965-1993 73 66% 117

Classes with closest relation at Level 1


Rank Class id link
1 28446 CATALUMINESCENCE//ENERGY BLDG ENVIRONM ENGN//CATALUMINESCENCE CTL
2 34300 BIOMED DEVICES RUMENTAT//BIO SNIFFER//BIOELECTRONIC SNIFFER
3 4896 INDOOR CHEMISTRY//INDOOR AIR//INDOOR AIR QUALITY
4 2568 OZONE FORMATION POTENTIAL//NON METHANE HYDROCARBONS//VOLATILE ORGANIC COMPOUNDS
5 5982 FORMALDEHYDE//DNA PROTEIN CROSS LINKS//NASAL TOXICITY
6 37651 ENVIRONM ODOUR//EPA SW846 METHOD 8270//GC MSD DETECTION LIMITS
7 13084 AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL//PASSIVE SAMPLER//DIFFUSION TUBES
8 6564 PEROXYACETYL NITRATE//ALKYL NITRATES//PEROXY RADICALS
9 23016 BIOARENA//FORMALDEMETHONE//BIOAUTOGRAPHY
10 21634 GASEOUS STANDARD MIXTURES//STANDARD GAS MIXTURES//IMMOBILIZED COMPOUNDS

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