USGS-NWQL: I-1700-85: Silica, dissolved, in water by colorimetric, molybdate blue

Summary
Analytes
Revision
Data and Sites

Official Method Name

Silica, dissolved, colorimetric, molybdate blue

Current Revision

1985

Media

WATER

Instrumentation

Spectroscopy (Colorimetry; Photometry)

Method Subcategory

Inorganic

Method Source

USGS-NWQL

Citation

Methods for the Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the United States Geological Survey, Book 5, Chapter A1 Edited by Marvin J. Fishman and Linda C. Friedman

Brief Method Summary

This method is no longer available through the USGS National Water Quality Laboratory. If using a local laboratory, refer to method report for more information.

Scope and Application

Applicable Concentration Range

Interferences

Quality Control Requirements

Sample Handling

Maximum Holding Time

Relative Cost

Unknown

Sample Preparation Methods

This method has 1 analyte associated with it.

Analyte	Detection Level	Bias	Precision	Pct False Positive	Pct False Negative	Spiking Level
Silica(7631-86-9) Cab-O-Sil-St-2-0 Diatomaceous Earth SiO2 Silica Silicon dioxide Zeolex 7A	N/A	N/A	N/A

Precision Descriptor Notes:	Inactive method; included for informational purposes as it is approved by EPA for regulatory use but no longer used by the USGS.
Detection Level Note:

Revision	PDF/Link
1985

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USGS-NWQL: I-1700-85: Silica, dissolved, in water by colorimetric, molybdate blue

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