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Sample Weight: 0.5 g

Summary

Mercury is determined by Cold Vapor Atomic Absorption Spectrometry (CVAAS). The sample is digested using a mixture of sulfuric and nitric acids, and dilute potassium permanganate and potassium persulfate in a water bath. Excess potassium permanganate is reduced by hydroxylamine sulfate solution, then Hg(II) is reduced by a solution of Tin(II) chloride (or stannous chloride). Mercury vapor is separated and measured with a FIMS 100 Mercury Analysis System.

The reporting limit range for Mercury is 1 ppb to 100,000 ppb.

Analytical Performance

Data will be deemed acceptable if recovery of Mercury is ±20% at five times the Lower Limit of Determination (LOD) and the calculated Relative Standard Deviation (RSD) of duplicate samples is no greater than 20%.

Project Contact

Jaime Azain
Phone: 303-236-9376
Email: jsazain@usgs.gov
Central Mineral and Environmental Resources Science Center

Mineral Resources Program Science Priority

The use of firm, trade, and brand names is for identification purposes only and does not constitute endorsement by the U.S. government.

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