Evaluated the chage in pH and TDS in water from beore boiling and the chage with the green tea brewing.

Water selection： Lifialla, untreated mineral water from Iceland. Even though the pH level according to their brocure is about 8.2, but actural testing showed 7.8. The TDS according to the meter is between 49-50ppm.

First boiled the water, and took some sample for measurement when cooled down.

Added some fresh mineral water to the pot, to bring tge temperature down to 80℃ and brew Chinese green tea, #LungJing.

Tea ：Water 1g：50ml

Water temperature ： 80℃

Steeping time: 30sec plus 1minute

Here is measurement of green tea