| Performance |
Measuring
Range
|
2 to 600 ppm |
Sampling Hours
|
1 to 10 hours |
Detecting Limit
|
2ppm (10 hours) |
Color Change
|
Yellow --->
Reddish Brown |
| Reaction
Principle |
Methyl Ethyl Ketone
reacts with hydroxylamine phosphate to librate phosphrous acid, which
discolors pH indicator to reddish brown.
3CH3COC2H5 + (NH2OH)3H3PO4 ---> H3PO4
H3PO4 + Base ---> Phosphate |
| Coefficient
of Variation |
10% (for 20 to
600 ppm-hr) |
| Shelf
Life |
2 Years |
| Corrections
for temperature & humidity |
Temperature correction
is necessary |
| Store the
tubes in the refrigerator to keep at 10oC (50oF) or below. |
