This article defines what a project charter is and why it is important. The project charter is a document that identifies your project vision and creates a fluid path for your project team. Identifying your objectives, stakeholders, methods, parameters, risks, and resources launches you on your way to project success.
The DPD is a method that uses colorimetric detection as a means to measure the amount of chlorine in a system. It stands for N,N-diethyl-p-phenylendiamine sulfate and the reaction between DPD and active halogens is what is detected and measured.
1 DPD-4 â The combination of DPD-1 (N,N Diethyl-1,4 Phenylenediamine Sulfate) and DPD-3 (KI) to samples containing free chlorine, total chlorine, bromine, iodine, chlorine dioxide, permanganate and/or ozone will result in pink through blood-red color development in the sample.2  Simply put, DPD-1 + DPD-3 = DPD-4.elow please find an EPA Compliant meter which make use of DPD chemistry for chlorine concentration determination: 1  eXact Micro 7+ Water Quality Testing Meter â EPA Compliant for free and total chlorine when used in conjunction with a DPD-based reagent system. 2  Handheld multi-parameter water quality testing meter.