T.R. Crompton 
Preconcentration Techniques for Natural and Treated Waters [PDF ebook] 
High Sensitivity Determination of Organic and Organometallic Compounds, Cations and Anions

Equipment used for the analysis of water is frequently insufficiently sensitive to be able to detect the low concentrations of organic and inorganic substances present in samples. Applying preconcentration to the sample prior to analysis means the results gained are more accurate and can be used to report trends more effectively. Each chapter of Pr