LaMotte HYDROXIDE, PHENOLPHTHALEIN & TOTAL ALKALINITY TEST KIT WAT-MPH-DR - Manual (Page 3)

PHENOLPHTHALEIN (P) AL KA LIN ITY PRO CE DURE
1.
Fill the test tube (0778) to the 5 mL line with sample water.
2. Add one Phenolphthalein Tablet (T-2246). Cap and mix until
tablet disintegrates. If a red color does not develop in the solution,
the P Alkalinity is zero. If a red color does develop, the P
Alkalinity is determined by titration in Step 3.
3. Fill the Direct Reading Titrator (0382) with *Alkalinity Titration
Reagent (6102DR). Insert the Titrator tip in the center hole of the
test tube cap.
4. While gently swirling the tube, slowly press the plunger until the
red color disappears. Record the P Alkalinity test result directly
from the Titrator in ppm CaCO
3
. Do not move Titrator plunger.
Save sample and remaining titrant for Total (T) Alkalinity test.
TO TAL (T) AL KA LIN ITY PRO CE DURE
If only Total Alkalinity is to be tested, perform Steps 1, 5 and 6, and
using a full Titrator for Step 6.
5.
Carefully remove Titrator and cap from test sample from Step 4.
Add one BCG-MR Indicator Tablet (T-2311). Cap and mix until
tablet disintegrates.
6. Reinsert the Titrator tip into the test tube cap and continue the
titration until the green-blue color changes to pink. Read the test
result from the Titrator in ppm CaCO
3
.
When testing swimming pool water, consult the Acid Demand Index to
determine if the Total Alkalinity value is excessive. The Index will
indicate the recommended quantity of acid required to offset high
alkalinity content.