Zinc oxide is the metal zinc that has been oxidized. The chemical formula is ZnO, 1 zinc atom and 1 oxygen atom held together by an ionic bond. Zinc oxide does occur in nature as the mineral zincite, but it is quite rare and commercially unavailable.
I have done a few stool samples in my time and have always just stored them in the fridge, until the next day to take them into the docs. Good luck hun I hope they get it sorted.
To begin with urine is sterile...so if you keep it in a clean jar and refrigerate it below 4 degree celcius (which is the temperature in a properly working fridge) it should stay fresh for a few days.newfangled_04 Â· 9 years ago.Thumbs up.o begin with urine is sterile...so if you keep it in a clean jar and refrigerate it below 4 degree celcius (which is the temperature in a properly working fridge) it should stay fresh for a few days.