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When your concentration changes from v/v to w/v
I prefer w/w concentration for my mixtures.
Once had a QC method that did this where you had to weigh into a VF, and then weigh the 100g of water… because the difference between 100mL and 100g is apparently a big deal.
That’s just a shift from production to logistics.
Shout-out to my labmate who couldn’t use a micropipette correctly but didn’t know it, ruining data from collaborative projects with people on multiple occasions.
