NEMI Method Summary


Method Summary Information

Method Number:

4500-KMnO4

Media:

WATER

Revision:

Standard Methods Online

Method Source:

Standard Methods

Subcategory:

INORGANIC

Analytes in this method

Official Name:

Test Method B. Spectrophotometric Method

Descriptive Name

Potassium Permanganate in Water by Spectrophotometry

Source Info:

Standard Methods Online is jointly produced by the American Public Health Association (APHA), the American Water Works Association (AWWA), and the Water Environment Federation (WEF).
These organizations may be contacted by phone for more information on Standard Methods Online:
APHA: (301) 893-1894
AWWA: (800) 926-7337, (1-303-794-7711, outside U.S. / Canada)
WEF: (800) 666-0206 (1-703-684-2452 outside U.S. / Canada)

Citation:

Standard Methods Online

Brief Method
Summary:

This method is a direct determination of aqueous potassium permanganate solutions. The concentration is directly proportional to the absorbance as measured at 525 nm.

Scope And
Application:

This method is applicable to ground and surface waters.

Applicable
Conc Range:

0.1 to 100 mg KMnO4/L depending on cell path length

Interferences:

Turbidity and manganese dioxide. Other color-producing compounds also interfere.

QC Requirements:

None given

Sample Handling:

Potassium permanganate solutions, made in oxidant-demand-free water, are stable for long periods of time if kept in an amber bottle out of direct sunlight. For samples obtained from other sources (those having oxidant demand), analyze potassium permanganate on site, as soon as possible after sample collection.

Max Holding Time:

None given

Relative Cost:

Less than $50

URL to obtain ordering information for this method:

http://www.standardmethods.org/

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Method Summary Information