Skip Links

USGS - science for a changing world

Techniques and Methods 5–D2

Determination of Mercury in Aqueous and Geologic Materials by Continuous Flow–Cold Vapor–Atomic Fluorescence Spectrometry (CVAFS)

By Philip L. Hageman

coverpage and link to report PDF (971 kB)Download Publication
Techniques and Methods
Chapter 2
Section D, Geologic Analysis
Book 5, Laboratory Methods and Analysis
PDF (804 kB)
Right-Click to 'Download' or 'Save As'
Abstract

New methods for the determination of total mercury in geologic materials and dissolved mercury in aqueous samples have been developed that will replace the methods currently (2006) in use. The new methods eliminate the use of sodium dichromate (Na2Cr2O7 ·2H2O) as an oxidizer and preservative and significantly lower the detection limit for geologic and aqueous samples. The new methods also update instrumentation from the traditional use of cold vapor–atomic absorption spectrometry to cold vapor–atomic fluorescence spectrometry. At the same time, the new digestion procedures for geologic materials use the same size test tubes, and the same aluminum heating block and hot plate as required by the current methods. New procedures for collecting and processing of aqueous samples use the same procedures that are currently (2006) in use except that the samples are now preserved with concentrated hydrochloric acid/bromine monochloride instead of sodium dichromate/nitric acid. Both the “old” and new methods have the same analyst productivity rates. These similarities should permit easy migration to the new methods. Analysis of geologic and aqueous reference standards using the new methods show that these procedures provide mercury recoveries that are as good as or better than the previously used methods.

Version 1.0

Posted March 2007



Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Acrobat Reader or similar software is required to view it. Download the latest version of Acrobat Reader, free of charge or go to access.adobe.com for free tools that allow visually impaired users to read PDF files.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/tm/2007/05D02/index.html
Page Contact Information: Contact USGS
Page Last Modified: Friday, December 02 2016, 03:47:09 PM