Acid Demand To Ph 4.3 With Tablet - Lovibond CheckitDirect Mode D'emploi

Methods
GB
0.0.0
Zero
Test
S:4.3
RESULT
Notes:
1. The terms total Alkalinity, Alkalinity-m, m-Value and Alkalinity to pH 4.3 are identical.
2. For accurate results exactly 10 ml of water sample must be taken for the test.
3. Conversion table:
Acid demand
to pH 4.3
in mmol/l
x Factor = Result
* Carbonate hardness (reference = Hydrogencarbonate-anions)
Example: 2,5 mmol/l · 2,8 = 7,0° german Hardness (°dH)
CheckitDirect_Cl-Br-pH-CyA-S:4.3-CaH_2c 11/2012

Acid demand to pH 4.3 with Tablet

0.1 – 4 mmol/l
Fill a clean vial (24 mm Ø) with 10 ml of the water sample and
perform zero calibration (see "Operation").
Add one ALKA-M-PHOTOMETER tablet straight from the foil to the
10 ml water sample and crush the tablet using a clean stirring rod.
Close the vial tightly with the cap and swirl gently several times until
the tablet is dissolved.
Place the vial in the sample chamber making sure that the
are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 3 seconds.
The result is shown in the display as Acid demand to pH 4.3
in mmol/l.
Tolerance: ± 5% (full scale)
CaCO
3
Calciumcarbonate german Hardness
Factor
50
°dH* °fH*
french Hardness
Factor Factor
2,8 5,0
marks
°eH*
english Hardness
Factor
3,5
35