Hach DR/700 - Page 592

61-36
MOLYBDENUM, MOLYBDATE, LR continued
4. Fill a 25-mL
sample cell to the
20-mL line with the
sample.
Note: For proof of
accuracy, use a 2.0 mg/L
Molybdenum Standard
Solution (preparation
given in Accuracy
Check) in place of the
sample.
Note: Filter turbid
samples using the
labware listed under
Optional Apparatus.
5. Add the contents
of one Molybdenum
1 Reagent Powder
Pillow. Cap Shake
the sample cell to
dissolve the reagents
(the prepared
sample).
6. Fill a 10-mL cell
to the 10-mL line
with prepared
sample.
7. Add 0.5 mL of
Molybdenum 2
Reagent to the 10-mL
cell. Cap and invert
several times to mix.
This is the developed
sample.
Note: Molybdenum will
cause a green color to
form.
8. Wait two minutes. 9. Fill a 10-mL cell
to the 10-mL line
with prepared sample
(the blank). Cap.
2 minutes