Two Little Dippers

launch321

Member
Jun 30, 2020
5
Space Coast, Florida
Stupid chemistry question:

On the fas dpd test.
When I add 2 dippers of R0870 I have difficulty getting the powder to dissolve. Is it supposed to dissolve completely?
I end up with some powdery residue in my sample.
My powder expires 07/21 so I’m not sure if it’s bad.
Am I doing something wrong

I ordered a speed stir but haven’t received it yet.
Thanks
Chris
 

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
17,271
Tucson, AZ
No. Not all of the powder needs to dissolve. The powder is actually a mix of several chemicals one of which dissolves slowly and may not completely dissolve. It’s supposed to do that. It’s ok.