Color by ADMI Weighted-Ordinate Method
Method Abstract #138
Scope and Application
This method conforms to Standard Method 2120 F and EPA Method 110.3. It determines the color units (CU) where 1 CU equals 1ppm of platinum. ADMI value is equivalent to CU taking the full spectrum into consideration. 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 MANTECH software including automated calibrations and audit trail. Transmittance is measured at 30 different wavelengths and calculations are performed to determine a single value which is compared against a Pt-Co calibration curve.
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
