NEMI Method Summary


Method Summary Information

Method Number:

340.1

Media:

WATER

Revision:

Issued 1971; Editorial Revision 1974 and 1978

Method Source:

U.S. EPA National Exposure Research Laboratory (NERL) [formerly EMSL]

Analytes in this method

Subcategory:

INORGANIC

Official Name:

Fluoride, Total (Colorimetric, SPADNS with Bellack Distillation)

Descriptive Name

Fluoride by Colorimetry

Source Info:

U.S.EPA National Exposure Research Laboratory (NERL)
Microbiological and Chemical Exposure Assessment Research Division (MCEARD)
[formerly the Environmental Monitoring Systems Laboratory (EMSL), Cincinnati, OH]
26 West Martin Luther King Drive
Cincinnati, Ohio 45268-0001
Fax: 513-569-7757
email: DWmethods.help@epa.gov

Citation:

Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)

61929

Byte file

Brief Method
Summary:

Following distillation to remove interferences, the sample is treated with SPADNS reagent. The loss of color resulting from the reaction of fluoride with zirconyl-SPANDS dye is a function of fluoride concentration.

Scope And
Application:

This method determines fluoride in drinking, surface, and saline waters; domestic and industrial wastes.

Applicable
Conc Range:

0.1 - 1.4 mg/L

Interferences:

Reagent Addition: Error in reagent addition is the most prominent source of error in this test.

QC Requirements:

None.

Sample Handling:

Care must be taken to avoid overheating the flask above the solution level.

Max Holding Time:

28 days (MCAWW, Table 1).

Relative Cost:

Less than $50

5773

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Method Summary Information