Cleaning Petri Dish for evaporation test

[Juliusx33]

Hello, I have done a few evaporation tests but am not convinced the Petri dishes I have used were clean enough for the results to be valid. I say this because after cleaning with soap and hot water, there are still thin stains in a certain light. How would one clean their glass sufficiently enough so when doing an evap test, the surface is clean as can be?

Thank you

 

[Jagube]

Wash it with distilled vinegar maybe, so at least you don't get limescale stains from your (presumably tap) water?

 

[Juliusx33]

Okay, once I wash it with this distilled vinegar, is patting it down with some paper towel advisable, or instead letting it evaporate? Also, yes, high quality tap water.

 

[doubledog]

I always use IPA, then water and then paper towel.

 

[Juliusx33]

Fantastic, will get some tomorrow :thumb_up:

 

[Juliusx33]

I always use IPA, then water and then paper towel.

This worked perfectly much appreciated