245.7z.001 May 2026

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

: High-purity argon gas carries the vapor into the CVAFS analyzer , where it is exposed to UV light (253.7 nm), causing fluorescence that is then measured. Critical Interferences

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) concentrations in various water sources, including drinking water, surface water, and industrial wastewater. It is favored for its high sensitivity, allowing for detection at parts-per-trillion levels. Technical Principles

: Gold, silver, and iodide can interfere with the reduction process. : Stannous chloride is added to reduce these

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The method relies on . Unlike traditional absorption methods, CVAFS measures the light emitted by excited mercury atoms. Technical Principles : Gold, silver, and iodide can

: 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