Hach Co.: 8288: Acid/Base Milliequivalent Determination Using Sodium Hydroxide
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Official Method Name
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Acid/Base Milliequivalent Determination Using Sodium Hydroxide |
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Current Revision
| 7/03 |
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Media
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WATER |
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Instrumentation
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Titration |
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Method Subcategory
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Inorganic |
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Method Source
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Citation
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Brief Method Summary
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A measured amount of sample is treated with a phenolphthalein colorimetric indicator and then titrated with a strong acid or base to pH 8.3. The amount of titrant used is directly proportional tot he milliequivalents of acid or base in the sample. These titrations also can be performed usinf a pH meter instead of a colorimetric indicator. |
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Scope and Application
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For water, wastewater, and seawater with beginning pH less than 8.3 |
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Applicable Concentration Range
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0-25000 meq/L |
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Interferences
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Highly colored or turbid samples may mask the color change at the end point. |
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Quality Control Requirements
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Sample Handling
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Collect samples in clean plastic or glass bottles. Fill completely and cap tightly. Avoid agitation and prolonged exposure to air. Samples should be analyzed as soon as possible after collection but can be stored at least 24 hours by cooling to 4 deg. C or below. Warm to room temperature before analyzing. |
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Maximum Holding Time
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24 hours @ 4deg. C. |
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Relative Cost
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Less than $50 |
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Sample Preparation Methods
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