Testing methods for metals in tap water include ICP emission spectrometry, atomic absorption spectrometry, and colorimetry using absorption spectrophotometry.
Simultaneous analysis by ICP emission spectrometry is introduced below.

Profiles of Al (167.079 nm), Cd (228.802 nm), and Cu (324.754 nm)

ICP Emission Spectrometer

ICP Emission Spectrometer

Offers the highly sensitive simultaneous analysis of metals and inorganic components, without pretreatment. This instrument supports an extensive range of analysis from trace levels to high concentrations, including analysis for research and development, automated analysis for production control, and water-quality monitoring analysis for environmental management.