An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Anderson KB, Halpin ST, Johnson AS, Martin RS, Spence DM.Anderson KB, et al. Among authors: spence dm.Analyst. 2013 Jan 7;138(1):137-43. doi: 10.1039/c2an36171j. Epub 2012 Nov 2.Analyst. 2013.PMID: 23120748Free PMC article.
Price AK, Martin RS, Spence DM.Price AK, et al. Among authors: spence dm.J Chromatogr A. 2006 Apr 14;1111(2):220-7. doi: 10.1016/j.chroma.2005.07.083. Epub 2005 Oct 5.J Chromatogr A. 2006.PMID: 16569581