Quote:
Originally Posted by crimper
No need to buy those dropper from Amazon or ebay, if you had used those little "Blue Bottles" from Zeovit as they have droppers. I have used them in making my own calibration fluid. It will last a life time  |
Not that kind of dropper. A sealed one, like eye drops. An open dropper is prone to evaporation and contamination.
Quote:
Originally Posted by Frogger
Do not use the Sybon Standard Seawater Saline because it is almost 4ppT off.
|
I have found the same thing even though it is NIST-certified!! I like the dropper bottle it is sealed in though. It reads the same when it's 6 years old.