NEMI Method Summary


Method Summary Information

Method Number:

340.3

Media:

WATER

Revision:

Issued 1971

Method Source:

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

Analytes in this method

Subcategory:

INORGANIC

Official Name:

Fluoride (Colorimetric, Automated Compexone)

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)

41280

Byte file

Brief Method
Summary:

Fluoride ion reacts with the red cerous chelate of alizarin complexone which is determined by automated colorimetry.

Scope And
Application:

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

Applicable
Conc Range:

0.05 - 1.5 mg/L

Interferences:

Aluminum interference (aluminum forms a complex with fluoride) can be eliminated by treating the sample with 8-hydroxyquinoline (to complex aluminum) and extraction with chloroform. At aluminum levels below 0.2 mg/L, the extraction procedure is not required.

QC Requirements:

None.

Sample Handling:

No special requirements.

Max Holding Time:

28 days (MCAWW, Table 1).

Relative Cost:

Less than $50

5775

Page 1

Method Summary Information