Aluminium Photometric Test

Description

1. Method
In weakly acidic, acetate-buffered solution aluminium ions react with Chromazurol S to form a blue-violet compound that is determined photometrically. Due to the intrinsic orange coloration of the reagent blank, the measurement solution is orange-red to red in color.
The method is analogous to APHA 3500-Al-B and DIN ISO 10566 E30.

2. Measuring range and number of determinations
Cell                       Measuring range                 Number of
mm                               mg/l Al                        determinations
50                           0.020- 0.200                         350
20                         0.05 – 0.60                              350
10                           0.10 – 1.20                            350

3. Applications
Sample material:
Groundwater, surface water, and seawater
Drinking water
Industrial water
Wastewater and percolating water

4. Influence of foreign substances
This was checked individually in solutions containing 0.3 and 0 mg/l Al. The determination is not yet interfered with up to the concentrations of foreign substances given in the table. Cumulative effects were not checked; such effects can, however, not be excluded.