Phosphorus, Reactive
Phosphorus, Reactive
Page 2 of 6
PhosphorusReac_PT_Low_ASC_Eng_Ody.fm
5. Fill this rinsed
cylinder to the 25-mL
mark with sample.
6. Pour the contents of
the 25-mL cylinder into
one of the flasks.
7. Measure a second
25-mL portion of sample
into the graduated
cylinder and pour the
contents into the second
flask.
8. Add 1.0 mL of
Molybdate reagent to
each flask using a
Repipet Jr. Dispenser.
Swirl to mix.
9. Add 1.0 mL of
prepared Ascorbic Acid
reagent to one of the
flasks with a Repipet Jr.
Dispenser. Swirl to mix.
The remaining flask will
be the blank.
10. Touch the timer icon.
Touch
OK.
A five-minute reaction
period will begin.
11. When the timer
beeps, pour the contents
of the flask that contains
the blank into the
Pour-Thru Cell.
12. After the flow stops,
touch
Zero.
The display will show:
0 µg/L PO
4
3–
13. Pour the contents of
the second flask into the
Pour-Thru Cell.
After the flow stops,
touch
Read. Results will
appear in µg/L PO
4
3–
.
14. Flush the Pour-Thru
Cell with at least 50 mL of
deionized water
immediately after use.
Zero
To Next Page
Loading...
