I have picked up a Phosphorus ULR colorimeter, and between the reagents that came included in the package that expire 6 months + from now and the reagents I just bought produced about 5 “lots” later (expiring late 2023) the tests in the same vials are 200ppb vs 30ppb within expected margins
how inconsistent are Hanna reagents? Is it because of shipping?
how inconsistent are Hanna reagents? Is it because of shipping?