|
|
| Performance |
Measuring
Range
|
0.5 to 20 ppm |
Sampling Hours
|
2 minutes |
Detecting Limit
|
0.2 ppm |
Color Change
|
White --->
Brown |
| Reaction
Principle |
S2- + Pb(CH3COO)2 --->
PbS |
| Shelf
Life |
3 Years |
| Corrections
for temperature & humidity |
Unnecessary |
| Store the
tubes at cool and dark place. |
| Possible
coexisting substances and their interferences |
Substance
|
Concentration
|
Interference |
Change
color by itself |
SO32-
|
20 ppm or higher
|
No
|
No discoloration
upto 1% |
Cl-
|
100 ppm or higher
|
No
|
No discoloration
upto 5% |
Cr6+
|
0.2 ppm or higher
|
minus error
|
Yellow discoloration
at
higher than 1.0ppm |
CO32-
|
500 ppm or higher |
No |
No discoloration
upto 1% |
S2O32-
|
20 ppm or higher |
No |
No discoloration
upto 1% |
I-
|
200 ppm or higher |
No |
Yellow discoloration
at
higher than 3000ppm |
SO42-
|
100 ppm or higher |
No |
No discoloration
upto 1% |
PO43-
|
100 ppm or higher |
No |
No discoloration
upto 1% |
|
