Hach DR/700 - Page 102

42-18
MOLYBDENUM, MOLYBDATE, HR, continued
4. Fill a 25-mL cell
to the 25-mL line
with sample.
Note: For proof of
accuracy, use a
10.0 mg/L Molybdenum
Standard Solution
(listed under Optional
Reagents) in place of
the sample.
Note: Filter turbid
samples using the
labware listed under
Optional Apparatus.
5. Add the contents
of one MolyVer 1
Reagent Powder
Pillow. Cap and
invert several times to
mix.
6. Add the contents
of one MolyVer 2
Reagent Powder
Pillow. Cap and invert
several times to mix.
7. Add the contents
of one MolyVer 3
Reagent Powder
Pillow (the prepared
sample). Cap and
invert several times to
mix.
Note: If molybdenum is
present a yellow color
will develop.
8. Wait 5 minutes. 9. Fill a 25-mL cell
to the 25-mL line
with sample (the
blank). Cap.
5 minutes