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Feb 22, 2018

Water hardness test

Summary

I tested with the following product of water filter, comparing to Tube water (control group).


As a environment we use a water case from PearlCo and this reagent for water hardness.


Test protocol is as follows :
  • Repeat followings for each group
    • Fill out test tube with filtered water to 5 [ml] mark
    • Add titration solution drop by drop the while swirling test tube
    • Count drops until color changes from RED to GREEN 
  • Since 1 drop of reagent express 1 degree dH (see the measurement), calculate each hardness.

The result shows Tube water is 14, BRITA is 8 and PealCo is 4.

According to this Hard-soft classification table, each shows “Very hard”, “Hard” and “Moderately hard”.
Since I use the same environment ( water pot ), I should use PearlCo as long as I want to avoid drinking hard water.

I cannot rule out the possibility just by this trial:

a filter from the same maker as water pot may enhance effect of filter.
Because they can fit each other rather than other makers.


Drop count
Tube water
BRITA
PearlCo
0
1
SKIP
2
3
SKIP
4
5
SKIP

6

7
SKIP

8
SKIP

9


10


11


12


13


14