Chapter 4

Dye Nanoparticle-Coated Test Strips for Detection of ppb-Level Ions in Water

Yukiko Takahashi,    Department of Civil and Environmental Engineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan

Governments throughout the world are continuing to tighten contamination concentration limits and guidelines of harmful inorganic substances for industry and environmental water. For example, the World Health Organization recommends the standard allowance for water quality to be < 50 ppb for cadmium, lead, chromium(VI), mercury, selenium, and arsenic. Despite the increasing demands for simple and rapid monitoring of water quality, particularly for harmful ions, the sensitivities of commercial test kits and other existing methods ...

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