What is DPD reagent #1 used for?
A DPD reagent is the general term for DPD-1, a reagent used to test swimming pool free chlorine, bromine, and chlorine dioxide.
What is the difference between Taylor 2005 and 2006 test kits?
The only difference is the method used for testing chlorine. The K-2005 uses color-matching (DPD) while the K-2006 uses a drop test (FAS-DPD) to determine free, combined, and total chlorine.
How does a DPD test work?
A buffered DPD indicator powder is added to a water sample and reacts with chlorine to produce the pink color characteristic of the standard DPD test. Ferrous ammonium sulfate (FAS) is then added drop by drop until the pink color completely and permanently disappears, signaling the endpoint of the reaction.
What does DPD mean in pool testing?
N-diethyl-p-phenylenediamine
Definition of DPD. The acronym DPD stands for N,N-diethyl-p-phenylenediamine and is a reagent used in chlorine testing.
How often should you replace your pool test kit?
Most pool test reagents will last a year at least. Some will expire after two years or longer. These timeframes are dependent on the reagent and the manufacturer. It’s also important to note that these expiration dates can change periodically depending on the company making them.
What does FAS DPD stand for?
Ferrous ammonium sulfate
A buffered DPD indicator powder is added to a water sample and reacts with chlorine to produce the pink color characteristic of the standard DPD test. Ferrous ammonium sulfate (FAS) is then added drop by drop until the pink color completely and permanently disappears, signaling the endpoint of the reaction.
Should I test for free chlorine or total chlorine?
If the total chlorine level is higher than the free chlorine level, the difference of the two is the combined chlorine level. In order for your pool to be properly sanitized, the free chlorine level must remain higher than the combined chlorine level. This is why it’s so important to test your pool water regularly.