AOAC: 920.203: Manganese in Water
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Official Method Name
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Manganese in Water by Persulfate Method |
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Current Revision
| Mar-96 |
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Media
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WATER |
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Instrumentation
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Spectroscopy (Colorimetry; Photometry) |
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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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Evaporate samples to dryness per AOAC Method 920.202. Redissolve the remaining insoluble with HNO3 (1+1), evaporate again to dryness, and then treat with water, HNO3 and a little AgNO3 solution. If precipitate of AgCl appears, additional AgNO3 is added to remove the remaining silver, then filter to remove precipitate. Add ammonium persulfate to the filtrate, and heat over a steam bath until a pick color develops (after approximately 20 minutes). Compare color to a set of known standards prepared in a similar fashion. |
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Scope and Application
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This method is applicable to the determination of manganese in water by colorimetry. |
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Applicable Concentration Range
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None given. |
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Interferences
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Not specified in method. |
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Quality Control Requirements
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Not Included |
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Sample Handling
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No information given. |
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Maximum Holding Time
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Relative Cost
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Less than $50 |
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Sample Preparation Methods
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