Latest Impact Factor figures from Elsevier's Physical Chemistry and Spectroscopy Journals
We are pleased to bring you the latest Impact Factor figures from Elsevier's Physical Chemistry and Spectroscopy journals.
Highlights include Current Opinion in Colloid and Interface Science increasing by 30% and International Journal of Mass Spectrometry increasing by more than 25%!
Elsevier now publishes 50% of the top 80 titles in the Physical Chemistry category.
Thank you to all the authors, reviewers and editors for making these journals such a success.
Further highlights include...
 | Current Opinion in Colloid & Interface Science | |
| 2010 Impact Factor WAS 6.1302011 Impact Factor NOW 8.010 |  | |
 | Colloids and Surfaces B: Biointerfaces | |
| 2010 Impact Factor WAS 2.7802011 Impact Factor NOW 3.456 |  | |
 | Journal of Photochemistry & Photobiology, B: Biology | |
| 2010 Impact Factor WAS 2.1162011 Impact Factor NOW 2.814 |  | |
 | International Journal of Mass Spectrometry | |
| 2010 Impact Factor WAS 2.0092011 Impact Factor NOW 2.549 |  | |
Calculating Impact Factors
WHAT IS AN IMPACT FACTOR?
The journal impact factor is a measure of the frequency with which the average article in a journal has been cited in a particular year. The impact factor helps you evaluate a journal's relative importance, especially when you compare it to others in the same field. The impact factor is calculated by dividing the number of citations in the current year to items published in the two previous years by the total number of items published in the two previous years.
| Cites in 2011 to items published in: | 2010 2009 Sum |
= 258 = 199 = 457 |
| Number of items published in: | 2010 2009 Sum |
= 116 = 71 = 187 |
| Calculation: | Cites to recent items | 457 | = 2.444 |
| Number of recent items | 187 |
The 2011 Impact Factor for Journal X is 2.444
Journal Performance Measurements
Journal performance measurements offer a systematic, objective means to critically evaluate journals, and several indicators are available.
For more information visit: http://www.elsevier.com/wps/find/editorshome.editors/biblio