• Free and Total Chlorine

• Approved for reporting
• 30mL size contains 144 5mL tests. 60mL size contains 288 5mL tests
• DPD#1A and DPD#1B are added to a 5mL or 10mL sample to test for free chlorine. DPD#3 is then added to measure total chlorine
   
• DPD Colorimeter Grade Tablets
• DPD Rapid Dissolve Tablets
• Chlorine Index
• Chlorine Reagent Index
• Laboratory Index

• Combined Chlorine = Total Chlorine - Free Chlorine

• Use DPD1 to measure the free chlorine

• Add DPD3 to the same sample to measure the total chlorine

• LaMotte liquid reagents separate DPD1 into two components for stability

• Free chlorine testing requires one bottle of 1A and one bottle of 1B

PURCHASE LIQUID DPD REAGENTS