|
|
| Performance |
Measuring
Range
|
(1) to 10 mg/l |
Sampling Hours
|
3 minutes |
Detecting Limit
|
0.5 mg/l |
Color Change
|
White --->
Pale blue |
| Reaction
Principle |
Ozone react with
indigo to produce chemical
reaction products to discolor the reagent to white.
2O3+ C16H10N2O2 ---> 2C8H5NO2+ 2O2
|
| Shelf
Life |
3 Years |
| Corrections
for temperature & humidity |
Water temperature
correction is necessary |
| Store the
tubes at cool and dark place. |
| Possible
coexisting substances and their interferences |
Substance
|
Concentration
|
Interference |
Change
color by itself |
H2O2
|
0.05 mg/l or higher
|
Minus error
|
No discoloration |
ClO-
|
5 mg/l or higher
|
Minus error
|
Produce
white discoloration for whole layer. Do not produce demarcation. |
500mg/l or higher
|
White stain |
Acid (H+)
|
-
|
Plus error
|
No discoloration |
Alkali (OH-)
|
-
|
Minus error
|
No discoloration |
|
