LaMotte CORROSION CONTROL Test Kit - Manual (Page 9)

CAL CIUM HARD NESS
QUANTITY CONTENTS CODE
15 mL *Sodium Hydroxide Reagent
w/Metal Inhibitors *4259-E
50 Calcium Hardness Indicator Tablets T-5250-H
60 mL Hardness Reagent #7 4487DR-H
1 Test Tube, 5-10-12.9-15-20-25 mL,
glass, w/cap 0608
1 Direct Reading Titrator, 0-200 Range 0382
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents
go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,
phone or fax.
NOTE: Carefully read the instruction manual for the LaMotte Direct
Reading Titrator before performing the titration described below. The
Titrator is calibrated in terms of Total Hardness expressed as parts per
million (ppm) Calcium Carbonate (CaCO
3
). Each minor division on the
titrator scale equals 4 ppm CaCO
3
.
PRO CE DURE
1.
Fill test tube (0608) to 12.9 mL line with the water sample.
2. Add 6 drops of *Sodium Hydroxide Reagent with metal inhibitors
(4259) to test sample. Cap and mix.
3. Add one Calcium Hardness Indicator Tablet (T-5250). Cap and gently
shake to dissolve tablet. A red color will appear.
4. Fill the Direct Reading Titrator (0382) with Hardness Reagent #7
(4487DR) as described in the instruction manual. Insert Titrator in
center hole of test tube cap.
5. Slowly depress plunger and swirl sample after each drop until Red
color changes to Blue. Read test result directly from the scale where
the larger ring on the Titrator meets the Titrator barrel. Result is
expressed as Total Hardness in ppm CaCO
3
.
EXAMPLE: Plunger tip is 3 minor divisions below line 80. The test
result is 80 plus (3 divisions x 4) equals 92 ppm.
NOTE:
If the plunger tip reaches the bottom line on the titrator scale
(200 ppm) before endpoint color change occurs, refill Titrator and
continue titration. When recording the test result, be sure to include
the value of the original amount of reagent dispensed (200 ppm).
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