LaMotte 1200 Colorimeter - Manual (Page 33)

1200 COLORIMETER
CHLORINE
DPD LIQUID TEST
MODEL 1200-CL-LI • CODE 3670-01-LI
QUANTITY CONTENTS CODE
30 mL DPD #1A Free Chlorine Reagent P-6740-G
30 mL *DPD #1B Free Chlorine Reagent *P-6741-G
30 mL *DPD #3 Total Chlorine Reagent *P-6743-G
1 Colorimeter Tubes, with caps 0290-6
1 Water Sample Collecting Bottle 0688
1 1200 Colorimeter for Chlorine DPD 26728
*WARNING: Reagents marked with a * are considered to be potential health hazards. To view or
print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
www.lamotte.com. To obtain a printed copy, contact LaMotte by email, phone or fax.
To order individual reagents or test kit components, use the specified code number.
INTRODUCTION
Chlorine is added to water to kill bacteria and other disease-producing organisms,
control algae, and remove undesirable odors and colors. Chlorine added to water quickly
forms hypochlorous acid, HClO, also known as Free Available Chlorine, the active
ingredient responsible for chlorine's sanitizing capabilities. Free Available Chlorine
combines with impurities in the water to form chloramines and other organic nitrogen
compounds. In combined form, its sanitizing capability diminishes, and higher levels of
chlorine are necessary to achieve effective sanitation.
Therefore, it is essential to chlorinate to the point of establishing a Free Available
Chlorine Residual, and then to maintain that residual at a recommended level. The
LaMotte DPD method distinguishes levels of Free Available Chlorine, Combined
Chlorine, and Total Residual Chlorine, using a single test sample.