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Environmental Samples

Environmental samples, which can be broadly classified into gases, liquids and solids, vary in detail,
and range widely in concentration of contaminants from the ppt level to the percentage level. There is
also the possibility of contamination among samples and errors during the measuring sequence. In
addition, contamination can occur during the analyzing process since measurement is performed for
contaminants originally existing in the environment. Therefore, careful control is required during the
analysis operation and regarding the use of tools and reagents. Below a brief outline of the steps in the
procedures from sampling through to chromatography is given. For more information on individual
operations, refer to the books referenced [1].

1.3.2.1—
Gas Sample

The sampling methods for contaminants in gas can be generally classified into either of the following:
the method using a liquid (the solution trapping method), the method using a solid phase

Edited by Toshimasa Toyo'oka: Modern Derivatization Methods for Separation Sciences (c) 1999 John
Wiley & Sons Ltd.

http://emedia.netlibrary.com/nlreader/nlreader.dll?bookid=17968&filename=Page_51.html 30/09/2003