LaMotte Water Analysis Kit for Home Brewers - Manual (Page 5)

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CALCIUM HARDNESS
Fill tube ( 4488) to line
with water sample.
Add 6 drops of
*Sodium Hydroxide
Reagent (4259)
and swirl to mix.
Add 1 Calcium Hardness
Indicator Tablet (T-5250)
and swirl to dissolve tablet.
Sample will turn Red if
Hardness is present.
Proceed to next step.
If sample is
Blue , Calcium
Hardness is 0 ppm.
Record as ppm CALCIUM
Hardness (CaCO
3
ppm).
To convert to calcium
(Ca +2 ) multiply the test
result by 0.4.
MAGNESIUM HARDNESS
TOTAL Hardness value____minus CALCIUM Hardness value ____=
MAGNESIUM Hardness (CaCO
3
ppm)
To convert to magnesium (Mg +2 ) multiply the test result by 0.24.
Line
Equivalence
(ppm per drop)
Upper 1 drop = 10 ppm
Lower 1 drop = 20 ppm
Hold the Hardness Reagent #7 (4487WT)
vertically to add one drop at a time
( swirling and counting after each drop)
until color changes completely from Red
to Blue and remains for 30 seconds.
Brush and rinse tube promptly after testing.
Multiply number of drops:
Upper line multiply x 10
Lower line multiply x 20
If the calcium hardness is greater than 500 ppm,
use the 0.5 mL pipet (0353) to transfer 1.0 mL
(two measures) of the water sample to the
test tube (4488). Fill tube to 10 ppm line with
distilled water. Follow Steps 2 through
5. Multiply the number of drops by 86.