Standard Methods: 2150 B: Threshold Odor Test
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Official Method Name
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2150 B. Threshold Odor Test |
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Current Revision
| Standard Methods 21st Edition (2005); Standard Methods Online |
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Media
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WATER |
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Instrumentation
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Not Applicable |
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Method Subcategory
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Physical |
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Method Source
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Citation
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Brief Method Summary
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Determine the threshold odor by diluting a sample with odor-free water until the least definitely perceptible odor is achieved. |
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Scope and Application
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This threshold method is applicable to samples ranging from nearly odorless natural waters to industrial wastes with threshold numbers in the thousands. There are no intrinsic difficulties with the highly odorous samples because they are reduced in concentration proportionately before being presented to the test observers. |
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Applicable Concentration Range
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Interferences
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Quality Control Requirements
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Sample Handling
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Collect samples for odor testing in glass bottles with glass or TFE-lined closures. Complete tests as soon as possible after sample collection. If storage is necessary, collect at least 500 mL of sample in a bottle filled to the top; refrigerate, making sure that no extraneous odors can be drawn into the sample as it cools. Do not use plastic containers. |
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Maximum Holding Time
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6 hours |
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Relative Cost
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Less than $50 |
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Sample Preparation Methods
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