LaMotte PHENOLPHTHALEIN/TOTAL ALKALINITY TEST KIT WAT-MP-DR - Manual (Page 2)

PHENOLPHTHALEIN (P) AL KA LIN ITY PRO CE DURE
1.
Fill test tube (0778) to 5 mL line with sample water.
2. Add one Phenolphthalein Tablet (T-2246). Cap and mix until tablet
disintegrates. If solution does not turn red, P Alkalinity is 0. If
solution turns red, proceed to Step 3.
3. Fill the Direct Reading Titrator (0382) with *Alkalinity Titration
Reagent B (4493DR). Insert Titrator into center hole of test tube cap.
4. While gently swirling tube, slowly press plunger to titrate until red
color disappears. Read the test result directly from the scale where the
large ring on the Titrator meets the Titrator barrel. Record as ppm P
Alkalinity as CaCO
3
.
EXAMPLE: Plunger tip is 3 minor divisions below line 80. The test
result is 80 plus 12 (3 divisions x 4) equals 92 ppm.
5. If plunger tip reaches the bottom line on the Titrator scale (200 ppm)
before the color change occurs, refill the Titrator and continue the
titration. When recording test result, be sure to include the value of
original amount of reagent dispensed (200 ppm).
NOTE:
Do not move Titrator plunger after the P Alkalinity
endpoint has been obtained. The titration is continued in the T
Alkalinity procedure.
TO TAL (T) AL KA LIN ITY PROCEDURE
6.
Being careful not to move plunger, remove Titrator and cap from test
tube containing sample that was titrated in Step 4.
7. Add one BCG-MR Tablet (T-2311). Cap and shake until tablet
disintegrates. Solution will turn green-blue.
8. Reinsert Titrator in cap and continue titration until color changes
from green-blue to pink. Read the test result directly from the scale
where the large ring on the Titrator meets the Titrator barrel. Record
as ppm T Alkalinity as CaCO
3
. Be sure to include in test result value
the total amount of titration reagent dispensed (i.e. see Step 5).
9. If only Total Alkalinity is to be tested, perform Steps 1,7 and 8 only,
using a full Titrator in Step 8.