Skip to main content
U.S. flag

An official website of the United States government

Chapter A5. Section 6.4.A. Arsenic Speciation

June 20, 2007

Two sample-processing methods (field speciation and laboratory speciation) used at the USGS National Water Quality Laboratory (NWQL) are specific to sample analysis by inductively coupled plasma-mass spectrometry (ICP-MS) for determining the concentration of inorganic and organic arsenic species in a water sample. The field-speciation method requires NWQL Schedule 1729. The laboratory-speciation method requires use either of NWQL Schedule 1730, 1731, or 1732, as appropriate for study objectives. For either the field- or laboratory-speciation method, prior knowledge is needed of sample matrix-composition characteristics (that is, major-ion concentrations in filtered samples). Major-ion data are necessary to determine (1) the volume of ethylenediaminetetraacetic acid (EDTA) that will be required for sample preservation, and (2) if sample dilution is required.

Citation Information

Publication Year 2005
Title Chapter A5. Section 6.4.A. Arsenic Speciation
DOI 10.3133/twri09A5.6.4.A
Authors John R. Garbarino
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Techniques of Water-Resources Investigations
Series Number 09-A5.6.4.A
Index ID twri09A5.6.4.A
Record Source USGS Publications Warehouse
USGS Organization U.S. Geological Survey