This biennial review covers developments in water analysis for emerging environmental contaminants over the period of 2009-2010. A few significant references that appeared between January and February 2011 are also included. Analytical Chemistry's policy is to limit reviews to a maximum of 250 significant references and to mainly focus on new trends. Even with a more narrow focus, only a small fraction of the quality research publications could be discussed. As a result, as with the previous review on Water Analysis in 2009, this review will not be comprehensive but will highlight emerging contaminant groups and discuss representative papers. I write a similar review article on Environmental Mass Spectrometry, which also focuses on emerging contaminants. That review article is somewhat different from this one, in that it focuses on mass spectrometry methods and applications and includes measurements of air, soil/sediments, and biological samples, in addition to water. This Review on Water Analysis focuses only on water measurements and applications but includes other methodologies besides mass spectrometry. I am excited to have Thomas Ternes join me this year (as in 2005) to cover the section on Pharmaceuticals and Hormones. Because Thomas is an international leader in this area, this Review will be much better with his contribution. We welcome any comments you have on this Review (richardson. susan@epa.gov).
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