LaMotte Water Analysis Kit for Home Brewers - Manual (Page 4)

HARDNESS TESTS (as CaCO
3
)
QUANTITY CONTENTS CODE
15 mL *Sodium Hydroxide Reagent w/Metal Inhibitors *4259-E
50 Calcium Hardness Indicator Tablets T-5250-H
15 mL *Hardness Reagent #5 *4483-E
100 Hardness Reagent #6 Tablets 4484-J
60 mL Hardness Reagent #7 4487WT-H
1 Test Tube, w/cap 4488
1 Pipet, 0.5 mL, plastic 0353
1 2
3
5
6
4 6
TOTAL HARDNESS
Fill tube ( 4488) to the line with
sample water.
Add 5 drops of
*Hardness Reagent
#5 (4483) and swirl
to mix.
Add 1 Hardness
Reagent #6 Tablet
(4484) and swirl to
dissolve tablet.
Sample will turn Red if Hardness
is present. Proceed to next step.
If sample is
Blue , Total Hardness
is 0 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.
Line
Equivalence
(ppm per drop)
Upper 1 drop = 10 ppm
Lower 1 drop = 20 ppm
Multiply number of drops:
Upper line multiply x 10
Lower line multiply x 20
Record as TOTAL
Hardness (CaCO
3
ppm)
If the total hardness is greater than 500 ppm,
use the 0.5 mL pipet (0353) to transfer
0.5 mL 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 172.