245.7z.001 Guide

: Gold, silver, and iodide can interfere with the reduction process.

The method relies on . Unlike traditional absorption methods, CVAFS measures the light emitted by excited mercury atoms. 245.7z.001

EPA Method 245.7 is a specialized analytical procedure used to determine mercury ( : Gold, silver, and iodide can interfere with

: Samples are first treated with a brominating digestion (potassium bromate/bromide) to convert all mercury forms into mercuric ions ( Hg2+cap H g raised to the 2 plus power 245.7z.001

: Stannous chloride is added to reduce these ions into elemental mercury vapor ( Hg0cap H g to the 0 power

: Moisture and water vapor must be removed using drying tubes to prevent "quenching," which weakens the fluorescence signal. Application and Precision