水草情迷

請問ph錶的電極棒用來調整ph值的電極水在那裡有得買呢?如果用蒸餾水來調整ph7值是否可行呢?

>如果用蒸餾水來調整ph7值是否可行呢?

No, it doesn't work this way. You can get them in chemical suppliers.

不可以啦, 蒸餾水不一定是 ph7的.

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Thanks ! Macbrush,但如果要在化工鋪買,怎樣跟他們說呀?是不是跟他們說要買ph7的電極水呢?而且是否要買很多的?因為我想用的數量不多!大約多少錢呢?

Calibration solution for the pH electrode is easily found in the aquarium shop in mongKok .

For ordinally use "pinpoint" is suggestion . They have pH 4, ph 7. It is based on the accuracy you needed.

I can share my experience with you.
In some Chemical store, there is more than two types you can find.

a) In Bulk ~ 1 Litre , Several hundreds to thousand
it is based on the brand name. i.e. Merck
b) In ampoule (~20 ml)
Both of them are commonly use in laboratory.

Before you purchase the calibration solution. I recommended you purchase same brand as your pH meter.
As some manufactuer, Jaqno, Buffer solution in 4.01 & 6.86 respectively for their calibration.

What brand name of pH meter you have??
How many digit you can read??
i.e 7.0 or 7.01???