LaMotte Fresh Water Aquaculture - Manual (Page 22)

22
Hardness
DESCRIPTION CODE
*Hardness Reagent #5 *4483-E
Hardness Reagent #6 Solution 4485-E
Hardness Reagent #7 4487DR-H
Test Tube, 5-10-12.9-15-20-25, glass, w/cap 0608
Direct Reading Titrator, 0-200 Range 0382
Pipet, 0.5 mL, plastic 0353
*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.
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
.
ANALYSIS OF HARDNESS IN SALT WATER
1 3 2
Use the 0.5 mL
pipet (0353) to
add 0.5 mL of the
salt water to the
test tube (0608). Fill the test tube
to the 12.9 mL
line with distilled
water (a 1 to
25.8 dilution). Follow Steps 2 through
9 under Hardness Test
procedure. Multiply
reading by 25.8. Record
as ppm Total Hardness
CaCO
3
.
When sea and estuarine waters containing very high levels of mineral salts are to be tested,
the sample must be diluted before titration. This test set is supplied with a calibrated pipet
for perforning the simple, convenient dilution described below: