LaMotte DIAGRAM FOR AQ-3 - Manual (Page 7)

HARDNESS
REAGENTS AND APPARATUS
DE SCRIP TION CODE
*Hard ness Re agent #5 *4483-E
@TABLE = Hardness Reagent #6 Solution
4485-E
Hard ness Re agent #7 4487DR-H
Ti tra tion Tube, 5, 10, 12.9, 15, & 20 0726
Di rect Read ing Titrator, 0 - 200 Range 0382
Pipet, 0.5 mL, plas tic 0353
*WARNING: Reagents marked with a * are considered hazardous
substances. Material Safety Data Sheets (MSDS) are supplied for these
reagents. For your safety, read label and accompanying MSDS before using.
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
.
The following table provides a quick reference guide for dilutions of various
proportions. Once the dilution is prepared, use this diluted sample to perform
the test, and multiply the result by the dilution factor to obtain the actual
concentration.
Sample Size
Distilled Water To
Bring To 10 mL
Dilution
Factor
5 mL 5 mL 2
2.5 mL 7.5 mL 4
TITRIMETRIC PRO CE DURE
In a titrimetric method, titating solution (or titrant) is added to a treated
sample until a color change occurs. The volume of titrant required to reach
this endpoint is proportional to the concentration of the factor being tested.
Direct Reading Titrators provide results directly in the appropriate
concentration for the test.
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