Method Abstract #121, Color

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Determining the color units (CU) where 1 CU equals 1ppm of platinum

Method Abstract #121

Scope and Application

This method conforms to Standard Method 2120 C and EPA Method 110.2.  It determines the color units (CU) where 1 CU equals 1ppm of platinum.  Color is used as a general indicator of the quality of water.

Method Summary

This method employs an industry leading spectrophotometer completely controlled by the Man-Tech software including automated calibrations and audit trail. In general, 410nm is the selected wavelength; however, additional wavelengths may be used such as 455, 410 and 440 all while the sample is in the cuvette.

Sample Calibration Curve

Method Performance

*The Method Detection Limit (MDL) was determined based on data obtaining a coefficient of variance better than 30%. Results may differ depending on laboratory practices and sample matrix.

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