EPA Method 110.3


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EPA Method 110.3:
Color by Spectrophotometry. Official Name: Color by Spectrophotometry

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:
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.

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

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

QC Requirements:
None.

Maximum Holding Time:
48 hours (MCAWW, Table 1).

Media:
WATER

Subcategory:
Inorganic

Concentration:
Not Available.

Sample Prep:
None.

Precision:
See Standard Methods 204B, 14th Editions (1975).

Detection:
None.

Revision Number:
Issued 1974

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Examples:  8260
TO-15

Examples:  Dioxin
Mercury
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