WKS 276230 Manual De Instrucciones página 43

Methods
GB
Notes:
1. Before use, clean the vials and the measuring beaker with Hydrochloric acid (approx. 20%).
Rinse them thoroughly with deionised water.
2. To get accurate results the sample temperature must be between 20°C and 25°C.
3. A low test result may be given in the presence of Fluorides and Polyphosphates. The ef-
fect of this is generally insignificant unless the water has fluoride added artificially.
In this case, the following table should be used:
Fluoride
[mg/l
0.05
F]
0.2 0.05
0.4 0.06
0.6 0.06
0.8 0.06
1.0 0.07
1.5 0.09
Example: If the result of Aluminium determination is 0.15 mg/l Al and the Fluoride con-
centration is known to be 0.4 mg/l F, the true concentration of Aluminium is 0.17 mg/l Al.
Reagent
Set
VARIO Aluminium ECR F20
VARIO Aluminium Hexamine F 20
VARIO Aluminium ECR Masking Reagent
Displayed value: Aluminium [mg/l Al]
0.10 0.15 0.20
0.11 0.16 0.21
0.11 0.17 0.23
0.12 0.18 0.24
0.13 0.20 0.26
0.13 0.21 0.28
0.20 0.29 0.37
Form of reagent/Quantity
Powder Pack / 100
Powder Pack / 100
Liquid reagent / 25 ml
0.25 0.30
0.27 0.32
0.28 0.34
0.30 0.37
0.32 0.40
0.36 0.45
0.48 ---
Order-No.
535000