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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...

journal cover imageCurrent Opinion in Colloid & Interface Science
2010 Impact Factor
WAS
6.130
2011 Impact Factor
NOW
8.010
impact factor bar-chart
journal cover imageColloids and Surfaces B: Biointerfaces
2010 Impact Factor
WAS
2.780
2011 Impact Factor
NOW
3.456
impact factor bar-chart
journal cover imageJournal of Photochemistry & Photobiology, B: Biology
2010 Impact Factor
WAS
2.116
2011 Impact Factor
NOW
2.814
impact factor bar-chart
journal cover imageInternational Journal of Mass Spectrometry
2010 Impact Factor
WAS
2.009
2011 Impact Factor
NOW
2.549
impact factor bar-chart

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.

Using Journal X as an example:
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.

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