Test Procedures
CHLORINE
DPD TABLET METHOD • CODE 3643-SC
QUANTITY
CONTENTS
CODE
100
DPD #1 Instrument Grade Tablets
6903A-J
100
DPD #3 Instrument Grade Tablets
6197A-J
15 mL
Glycine Solution
6811-E
*WARNING:
Reagents marked with an * are considered to be potential health hazards. To
view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit code
number. For example, if the code is 4450WT-H, search 4450. To obtain a printed copy,
contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
All water for cities and communities must be sanitized; even waters that come from
clean sources, protected watersheds, reservoirs, and deep wells, are commonly sanitized
to assure safety. Chlorine is the most commonly used sanitizer for several reasons: it is
eff ective against a wide range of microorganisms, the cost is low, and the methods of
applying it have been well developed. If an adequate concentration of chlorine is present
in the water for a few minutes, disease producing bacteria will be destroyed. A number
of conditions aff ect the sanitizing action of chlorine. In municipal systems these can be
controlled so that if chlorine is detectable, it can be assumed that bacteria have been
killed. The factors that infl uence the rate of kill are temperature, pH, presence of other
materials that react with chlorine, time, and the concentrations of the various chlorine
combinations that are formed in the water with ammonia and other substances that react
with chlorine.
The fact that chlorine can be easily detected and measured makes chlorine a favorite
water sanitizer of those concerned with the public safety of water supplies. Chlorine
concentrations in the range of 0.1 to 0.4 parts per million are usually maintained in
municipal supplies.
Chlorine can be added in the form of chlorine gas, liquid sodium hypochlorite (bleach),
granular calcium hypochlorite or as organic chlorine compounds. Chlorine is not present
in natural water supplies; if it is present it is the result of chlorination of a water supply
or of chlorinated compounds being discharged as waste from industrial operations. The
presence of chlorine in concentrations above 0.5 parts per million should be considered
evidence of pollution from chlorine treated effl
uents or from a process in which high
concentrations of chlorine are used.
SMART Spectro 2 Test Procedures 05.02.16
CHLORINE,
DPD TABLET
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