NEMI Method Summary


Method Summary Information

Method Number:

110.3

Media:

WATER

Revision:

Issued 1974

Method Source:

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

Analytes in this method

Subcategory:

INORGANIC

Official Name:

Color by Spectrophotometry

Descriptive Name

Color by Spectrophotometry

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)

8997

Byte file

Brief Method
Summary:

Color characteristics are measured at pH 7.6 and at the original pH by obtaining the visible absorption spectrum of the sample on a spectrophotometer. The percent transmission at certain selected wavelengths is used to calculate the results.

Scope And
Application:

This method determines color in drinking, surface, and saline waters; domestic and industrial wastes. It must be used for industrial wastes that cannot be determined by the Platinum-Cobalt method.

Applicable
Conc Range:

Not Available.

Interferences:

Turbidity: Since very slight amounts of turbidity interfere with the determination, samples must be filtered before analysis.

QC Requirements:

None.

Sample Handling:

Refrigerate at 4^oC.

Max Holding Time:

48 hours (MCAWW, Table 1).

Sample Prep Met

None.

Relative Cost:

Less than $50

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Method Summary Information