twd000
Well-Known Member
recently had a problem with a drifting pH meter, and checked my 4 oz. bottles of calibration solution, only to realize they're expired by several years
Seems an expensive waste to buy the full bottles and have them go bad, or untrustworthy, before you can use them up
I see some other alternatives like a small 20 mL one-time-use sachet: Milwaukee M10007B pH 7.01 Calibration Solution Sachets (25)
Also I see some powder packets that you mix with distilled water: 20 Pack pH Buffer Solution Powder For Precise Calibration of pH Meter 761344867307 | eBay
But these are 6.86 instead of 7.01 that my meter needs
Doesn't distilled water drift after opening, by absorbing CO2?
Meter is a Milwaukee MW102
Seems an expensive waste to buy the full bottles and have them go bad, or untrustworthy, before you can use them up
I see some other alternatives like a small 20 mL one-time-use sachet: Milwaukee M10007B pH 7.01 Calibration Solution Sachets (25)
Also I see some powder packets that you mix with distilled water: 20 Pack pH Buffer Solution Powder For Precise Calibration of pH Meter 761344867307 | eBay
But these are 6.86 instead of 7.01 that my meter needs
Doesn't distilled water drift after opening, by absorbing CO2?
Meter is a Milwaukee MW102