I have a Taylor K-2006 test kit which includes the FAS-DPD test with the tube of powder R-0870 and a tiny spoon for measuring it. I am on my second such tube of powder. I notice that the little sccop never really empties even though I tap it over the comparator tube. After a while whatever is left in there turns black. I worry that I am not getting the proper amounts or that this black stuff contaminates the result or the unused powder. Between tests everything goes back in the plastic box which is stored inside the house in a cool dark place. What is the proper technique for handling the scoop and cleaning it?
When I put in the called for two scoops, I use "level" sccops as one would use when baking.
When I put in the called for two scoops, I use "level" sccops as one would use when baking.