1. W.W. Gorge (ed.), Reviews of Environmental Contamination and Toxicology (Springer, New York, 2000)
2. WHO, Guideline for Drinking Water Quality, 4th edn. (World Health Organization, Geneva, 2011)
3. Y.A. Zolotov, V.M. Ivanov, V.G. Amelin, Test methods for extra-laboratory analysis. Trends Anal. Chem. 21, 302–319 (2002)
4. M. Unger-Heumann, Strategy of analytical test kits. Fresenius J. Anal. Chem. 354, 803–806 (1996)
5. I. Oehme, O.S. Wolfbeis, Optical sensors for determination of heavy metal ions. Mikrochim. Acta 126, 177–193 (1997)