APHA Color
Using UV-Vis Spectroscopy
Features:
- Determine APHA values of 0 to 500 with UV-3600.
- Determine APHA values of 20 to 500 with UV-1201.
- No standard solutions required.
- Determine color objectively.
- Pathlength of 10mm.
- Calibrations determined using ASTM D 1209.
- Reference cell for UV-160U, UV-2101 and UV-3600.
Applications:
- Color Index on Clear Liquids
- Paint, Varnish, Lacquer Color
- Plastic Resins
- Perfumes
- Water Effluent Quality
- Water Whiteness of Solvents
Calibration Curves:
UV-1201: APHA# = 3294 (Abs @ 455nm) - 11.82
UV-160U: APHA# = 3290 (Abs @ 455nm) - 9.883
UV-3101: APHA# = 3592 (Abs @ 455nm) + 1.06
UV-1201: APHA# = 3294 (Abs @ 455nm) - 11.82
UV-160U: APHA# = 3290 (Abs @ 455nm) - 9.883
UV-3101: APHA# = 3592 (Abs @ 455nm) + 1.06
| Seq # | Sample ID | APHA | Abs |
|---|---|---|---|
| 1 | 1191 | 51.71 | .01410 |
| 2 | 1182 | 13.28 | .0034 |
| 3 | 1104 | 103.47 | .02851 |
| 4 | 1105 | 65.46 | .01793 |
| 5 | 1106 | 191.04 | .05289 |
| 6 | 1107 | 81.66 | .02244 |
| 7 | 1108 | 72.43 | .01987 |
| 8 | 1109 | 136.19 | .03762 |
| 9 | 1110 | 166.72 | .04612 |
| 10 | 1111 | 223.40 | .06190 |
Figure 2. Prediction of Unknown APHA values using ABS readings and standard calibration curves.
