A-A-50817 Revision A, September 7, 1988
COMPARATOR SET, COLOR CHLORINE-BROMINE AND PH DETERIMINATION
Includes all amendments and changes through Cancellation Notice 1, August 19, 2009
Additional Comments: CNCL NO S/S
The General Services Administration has authorized the use of this commercial item description.
This commercial item description covers a color comparator system using diethyl-p-phenylenediamine (DPD) No. 1 for free chlorine and bromine detection, and phenol red for pH determination.