EPA Method 200.7

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Determination of Metals and Trace Elements in Water and Wastes by Inductively Coupled Plasma-Atomic Emission Spectrometry

This method allows for the determination of metals and some nonmetals in solution. 

Sample types

• Solids
• Soils
• Sludges
• Sediments
• Aqueous solutions
• Aqueous solutions containing particulate and suspended solids

Sample size

Dependent on the sample type and analysis required, but the recommended sample size is 250 mL.

Analysis types

• Total recoverable
• Dissolved analytes
• Direct analysis

Applicable analytes

• Aluminum (Al)
• Antimony (Sb)
• Arsenic (As)
• Barium (Ba)
• Beryllium (Be)
• Boron (B)
• Cadmium (Cd)
• Calcium (Ca)
• Chromium (Cr)
• Cobalt (Co)
• Copper (Cu)
• Iron (Fe)
• Lead (Pb)
• Lithium (Li)
• Magnesium (Mg)
• Manganese (Mn)
• Mercury (Hg)
• Molybdenum (Mo)
• Nickel (Ni)
• Phosphorus (P)
• Potassium (K)
• Selenium (Se)
• Silica* (SiO₂)
• Silver (Ag)
• Sodium (Na)
• Strontium (Sr)
• Thallium (Tl)
• Tin (Sn)
• Titanium (Ti)
• Vanadium (V)
• Zinc (Zn)

*This method is not suitable for the determination of silica in solids. Refer to ASTM Method D3682.