LaMotte BROMINE - DPD TABLET User Manual

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
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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