Not off topic at all, an uncalibrated pH meter is worse than useless,
since the user will make decisions based on uncertain measurements.
The capsules may be Hydrion brand; orange is 4.00, green is pH 7.00,
blue is pH 10.00. If so, you add a capsule to 100 ml of distilled
water. They have a preservative solution also, the buffers can keep
for up to 3 months when that is used. I get them from Fisher
Scientific. The Omega catalog I have looks like they get them from
Hydrion too, based on the litmus papers they show.
They are very cost effective and are stable.
I can email you a FAQ for pH meters if you would like.
> Hello everyone.
> I contacted the vendor regarding this, but since many of you have
> undoubtedly done this I thought I might run it by you. Be gentle if
> is too off topic.
> What is the procedure for mixing the buffering solutions for the pH
> calibrations? The solutions that came with my meter (omega PHH-3) are
> a capsule form. I assume that I will need to disolve them in some
> distilled water. does the amount matter, 4-5 ml's ?
> Thanks, Dennis
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