BROMINE - DPD TABLET
1200 COLORIMETER, 0-7 ppm
CODE 3672-01
QUANTITY CONTENTS CODE
100 *Chlorine DPD #1 Tablets (Instrument Grade) *6903A-J
6 Colorimeter Tubes, w/caps 0290-6
1 Water Sample Collecting Bottle 0688
1 1200 Colorimeter for Bromine DPD 26730
*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.
To order individual reagents or test kit components, use the specifi ed code number.
INTRODUCTION
Bromine is added to water to kill bacteria and other disease-producing organisms,
control algae, and remove undesirable odors and colors. Bromine added to water,
forms hypobromus acid, the sanitizing form of bromine. Bromine forms free available
bromine and combined bromine or bromamines. Combined bromine is a very active
sanitizer.
BROMINE TEST PROCEDURE - DPD METHOD
Read the 1200 Colorimeter Manual before proceeding. Carefully
wipe tubes dry before inserting into the colorimeter chamber.
FREE AVAILABLE BROMINE
1.
3.
5.
Fill the Water Sample
Collecting Bottle
(0688) with sample
water. This will be
used to dispense
sample water for the
tests.
Insert the
tube into the
chamber, being
sure to align
the index line
with the arrow
on the meter.
Close the lid.
This tube is the
blank or zero.
Remove the
tube and add
one *Chlorine
DPD#1 IG
Tablet (6903A).
2.
4.
1200 COLORIMETER
••••••••••••••••••••••
ZERO
READ
6.
Rinse and fill a
colorimeter tube
(0290) to the
10 mL line with
sample water.
Cap and wipe
dry.
Push the READ
button to turn the
meter on. Press
the ZERO button
and hold it for
2 seconds until
bla is displayed.
Release the button
to take a zero
reading (0.00 ppm).
Cap tube and
shake for 10
seconds. Invert
slowly 5 times.
Make reading
within 30 seconds.
7.
1200 COLORIMETER
••••••••••••••••••••••
ZERO
READ
Align the index
line with the arrow
on the meter, insert
into chamber.
tube
Close the lid. Push
the READ button.
Record results as
ppm Bromine.
DPD BROMINE
TEST METHOD SPECIFICATIONS
APPLICATION
Drinking, surface, saline waters; swimming pool water; domestic and industrial waters
and wastes.
RANGE
0 to 7.0 mg/L Bromine (may be extended by dilution)
METHOD
In buffered sample, bromine reacts with disthyl-p-phenylene diamine (DPD) to
produce a pink-red color in proportion to the concentration of bromine present.
HANDLING & PRESERVATION
Bromine is aqueous solutions is not stable, and the bromine content of samples or
solutions, particularily weak solutions, will rapidly decrease. Exposure to sunlight or
agitation will acceslerater the reduction of bromine present in such solutions. For best
results, start analysis immediately after sampling. Samples to be analyzed for bromine
cannot be preserved or stored.
INTERFERENCES
The only interfering substance likely to be encountered in water is oxidized
manganese. The extent of this interference can be dtermined by treating a sample with
sodium arsenite to destroy the bromine present so that the degree of interference can
be estimated.
Iodine and chlorine can also interfere, but these are not normally present unless they
have been added as sanitizers.
LaMOTTE COMPANY
Helping People Solve Analytical Challenges
®
PO Box 329 • Chestertown • Maryland • 21620 • USA
800-344-3100 • 410-778-3100 (Outside USA) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
63672-01 07/14
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