|
|
| Iron (II) Ion |
Fe2+ |
NO.281 |
| Performance |
Measuring
Range
|
(5) to 50 mg/l |
Sampling Hours
|
5 minutes |
Detecting Limit
|
1.0 mg/l |
Color Change
|
White --->
Orange |
| Reaction
Principle |
Fe2+ + 1,10 Fenantoroline
(White) ---> Complex compound |
| 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 |
Zn
|
5 mg/l or higher
|
Plus error
|
No discoloration
by 100 mg/l |
Co
|
5 mg/l or higher
|
Plus error
|
Orange stain at
1 mg/l |
CN--
|
20 mg/ or lower
|
Minus error
|
No stain at 100
mg/l |
Fe3+
|
50 mg/l or higher
|
Plus error |
Pale orange stain
at 50 mg/l |
CU+
|
5 mg/l or higher
|
Minus error |
Pale orange at
1mg/l |
CU2+
|
10 mg/l or higher
|
Plus error |
Pale blue stain
at 50 mg/l |
Ni
|
5 mg/l or higher |
Plus error |
No stain at 100
mg/l or lower |
Mn
|
50 mg/l or higher
|
Minus error |
No stain at 100
mg/l |
PO43-
|
100 mg/l or higher |
No effect
|
No stain at 100
mg/l |
|
