New Grower Ph calibration solution question

[1guy1plant]

Mixed some solution for my new ph pen. Can I keep the solutions in jars and use it later? How long will it last?

 

[Rman73]

Mixed some solution for my new ph pen. Can I keep the solutions in jars and use it later? How long will it last?

From what I've read is u shouldn't use it again after its used cause it's contaminated
Might not give u a true reading

 

[Dr Fluff]

Once I have used it to calibrate my PH pen, the solution I used gets chucked out.

 

[Dr Who]

When you were at school you were probably told to decant a little of your buffer solution to use for each calibration into a little pot, then to chuck it away afterwards. This was good advice then as it is now. Your freshly made buffer will keep fine for a good while in a cool, dark place, just don't contaminate it by putting used solution back in the bottle. Buffers for pH values of around 7 are typically phosphate based so could probably support bacterial or algal growth in the right circumstances.

 

[pyrokev]

Ya Just toss it out after using it the one time

 

[pop22]

As doctor who said, keep it and use just what you need. I put the solution in then cap of my pen when calirating. If you have a good pen you probably only need to check it once a month