xi
PHOSPHORUS, REACTIVE, continued
81-51
4. Fill a cell with 10
mL of sample (the
blank). Cap. Collect at
least 40 mL of sample
in a 50-mL beaker.
Note: Run a reagent blank
for this test. Use deionized
water in place of the
sample in Step 4. Subtract
this result from all test
results run with this lot of
PhosVer.
5. Fill a PhosVer 3
Phosphate AccuVac
Ampul with sample.
Note: Keep the tip
immersed while the ampul
fills completely.
6. Place an ampul cap
securely over the tip of
the ampul. Shake the
ampul for approximately
30 seconds. Wipe off
any liquid and finger
prints.
Note: A blue color will
form if phosphate is
present.
Note: Accuracy is
unaffected by undissolved
powder.
7. Wait two minutes. 8. Place the blank in
the cell holder.
Note: In bright sunlight it
may be necessary to close
the cell compartment cover.
9. Press: ZERO
The display will count
down to 0. Then the
display will show
0.0 mg/l, and the zero
prompt will turn off.
2 minutes
30 seconds
To Next Page
Loading...
