LaMotte SMART3 Colorimeter - Manual (Page 237)

OZONE
DPD METHOD • CODE 4881
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
2 x 15 mL Glycine Solution 6811-E
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents
go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,
phone or fax.
Note: The primary use for this kit is in applications that use only ozone and no other
oxidizing disinfectants.
Ozone is sometimes used in place of, or in conjunction with, chlorine or other
halogens for disinfection of pool, spa or drinking waters. Recently, large aquatic
facilities have begun using ozone as a disinfectant in many artifi cial habitats.
APPLICATION: Bottled water, aquatic waters, and non-chlorinated
waters.
RANGE: 0.00 – 3.00 mg/L Ozone
MDL: 0.03 mg/L
METHOD: In the presence of iodide, ozone reacts instantly with the
buffered diethyl-p-phenylenediamine indicator (DPD) to
produce a red color in proportion to the amount of ozone
present.
SAMPLE HANDLING
& PRESERVATION:
Ozone in aqueous solutions, particularly weak solutions,
is not stable. Exposure to sunlight or agitation will
accelerate the reduction of ozone. Fill sample containers
to the top and cap tightly. Analyze samples as soon as
possible after collection.
INTERFERENCES: Interferences are other oxidizers, such as, chlorine,
bromine, iodine, and oxidized manganese. The DPD
reagent system used in this kit has a signifi cant
interference from chlorine. The interference from chlorine
only is eliminated with the addition of glycine.
SMART3 Test Procedures 11.10 OZONE, DPD, Liquid
Test P
rocedures