USGS-NWQL: I-3753: Solids, volatile-on-ignition, total, gravimetric
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Official Method Name
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Solids, volatile-on-ignition, total, gravimetric |
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Current Revision
| 1985 |
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Media
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WATER |
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Instrumentation
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Gravimetry |
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Method Subcategory
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Inorganic |
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Method Source
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|
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Citation
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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 |
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Brief Method Summary
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A measured volume of well-mixed, unfiltered sample is evaporated to dryness. The residue is dried at 105 oC for 2.0 h, cooled in a desiccator, and immediately weighed. See solids, total (method I-3750). The residue is then ignited at 550 oC and weighed, the difference in weight representing total volatile solids. |
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Scope and Application
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This method may be used to analyze any natural, treated, or industrial water and other waste. |
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Applicable Concentration Range
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NA |
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Interferences
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Care must be taken to ensure that a representative sample is provided. Usually, large, floating particles are excluded from the sample. Because of the great variability in the nature of the compounds that can be present in the sample, particularly in samples of industrial and other wastes, the determination can be considered only an approximation of the amount of volatile material present. Much of the volatile material may have been released during the determination of total residue. Moreover, ignition at 550 oC certainly volatilizes water of hydration from the hydrated salts present. |
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Quality Control Requirements
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Laboratory Blanks (LB) |
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Sample Handling
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Container Description: 250 or 500 mL polyethylene bottle. Handling and Treatment: Use unfiltered sample to rinse bottle. |
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Maximum Holding Time
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NA |
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Relative Cost
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Less than $50 |
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Sample Preparation Methods
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