Sample Collection
Dissolved samples are filtered and acid preserved. Total‑recoverable samples are acidified with HNO₃ to pH < 2; lab preservation may be used with the required hold before analysis.
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ICP-MS
US EPA Method 200.8
Overview of "Determination of Trace Elements in Waters and Wastes by Inductively Coupled Plasma-Mass Spectrometry"
US EPA Method 200.8 defines procedures for dissolved elements in groundwater, surface water and drinking water, and for total recoverable elements in these waters, wastewater, sludges and soils. The method covers 21 trace elements and details ICP‑MS calibration, internal standards, interference control and QC requirements.
End-to-End Analytical Process
Sample Preparation
For total recoverable results, solids or particulate samples are gently refluxed with HNO₃ + HCl. Dissolved/direct samples are acidified and diluted to volume.
Analysis & Maintenance
Prepared samples are analyzed by ICP‑MS with calibration blanks, internal standards, interference correction, tuning checks and ongoing QC verification.