Analytical Methods

Method 1631: Guidelines Establishing Test Procedures for the Analysis of Pollutants; Measurement of Mercury in Water

This method allows for the determination of mercury at a minimum level of 0.5 parts-per-trillion and supports measurements for mercury published in the National Toxics Rule and in the Final Water Quality Guidance for the Great Lakes System. Includes Guidance for Implementation and Use of Method 1631 and Revision E to the method, which contain additional and revised requirements.

• Method 1631, Revision E, Final Rule. (Federal Register Notice)
  (October 29, 2002) This final rule replaces the currently approved version of Method 1631 and includes revisions that address stakeholder concerns. This revision clarifies quality control and sample handling requirements and allows flexibility to incorporate additional available technologies. This rule also amends the requirements regarding preservation, storage, and holding time for low level mercury samples.
• Fact Sheet (PDF, 17KB)
• Method 1631, Revision E: Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Sepctometry (PDF, 1.6MB) (August 2002) (EPA-821-R-02-019) This method replaces the previously approved Method 1631 Revision C.
  
  
• Federal Register Notice - October 9, 2001 (PDF, 137KB).

Final Rule

• Method 1631: Guidelines Establishing Test Procedures for the Measurement of Mercury in Water, Technical Corrections (June 18, 2001) (PDF, 43kb)



• Fact Sheet



• Method 1631: Guidelines Establishing Test Procedures for the Analysis of Pollutants; Measurement of Mercury in Water



• Federal Register Notice (June 8, 1999)



• Fact Sheet

Notice of Data Availability*

• Federal Register Notice (March 5, 1999)



• Fact Sheet

Proposed Rule*

• Federal Register Notice (May 26, 1998)



• Fact Sheet (April, 1998)

*Note: The Notice of Data Availability and Proposed Rule are provided for historical documentation only.

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