|
|
| Performance |
Measuring
Range
|
1 to 100 ppm |
Sampling Hours
|
2 minutes |
Detecting Limit
|
0.05 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
|
Formula
|
Concentration |
Interference |
Chloride ion
|
Cl-
|
5000 ppm or higher
|
Plus error |
Chromate ion
|
CrO42-
|
25 ppm or higher
|
Minus error |
Carbonate ion
|
CO32-
|
500 ppm or higher
|
Plus error |
Thiosulfate ion
|
S2O32-
|
50 ppm or higher
|
Unclear demarcation |
|
