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. Author manuscript; available in PMC: 2015 Dec 22.
Published in final edited form as: Trends Analyt Chem. 2012 Sep;38:129–142. doi: 10.1016/j.trac.2012.05.004

Figure 2.

Figure 2

Percentage of analytical studies using LC and GC techniques for the biomarkers of the different pollutants (studies published 2005–2011; number of studies considered = 53).