pH buffer color
Posted 29 January 2010 - 11:08 AM
Posted 29 January 2010 - 01:49 PM
If you change a calibrator preparation by for example by "altering itīs colour" you lose "traceability": In effect your pH measurement has no real meaning. If you want a colored standard solution you should buy one with colour. If you buy one without colour READ THE LABLE.
Posted 29 January 2010 - 07:44 PM
why color them? if you want to distinguish one from the other, you can put red and yellow tapes on each container accordingly.
if you really want to color-code them, you can use FD & C Red No. 40 and FD & C Yellow No. 5. you'd probably need to re-adjust the pH because of the new addition. for this reason, i don't recommend you doing this.
either label them properly or go buy a color-coded version.