DR/2400
Molybdenum, Molybdate
Molybdenum_PP_Low_TER_Eng_Ody.fm Page 1 of 6
• Analyze samples immediately after collection.
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
• Filter turbid samples using filter paper (Cat. No. 1894-57) and a funnel (Cat. No. 1083-67).
Molybdenum, Molybdate
Method 8169
Ternary Complex Method
Powder Pillows
LR (0.02 to 3.00 mg/L)
Scope and Application: For boiler and cooling tower waters
1. Touch
Hach Programs.
Select program
315 Molybdenum LR.
Touch
Start.
2. Fill a 25-mL
graduated mixing
cylinder with 20 mL of
sample.
3. Add the contents of
one Molybdenum 1
Reagent Powder Pillow
to the graduated cylinder.
4. Stopper the cylinder
and shake to dissolve the
reagent (this is the
prepared sample).
5. Pour 10-mL of the
prepared sample into a
round sample cell.
6. Add 0.5 mL of
Molybdenum 2 Reagent
to the sample cell. Swirl
to mix. This is the
developed sample.
7. Touch the timer icon.
Touch
OK.
A two-minute reaction
period will begin.
8. When the timer
beeps, fill a second
sample cell with 10 mL of
the remaining prepared
sample (this is the blank).
Tips and Techniques
Powder Pillows Method 8169
Hach Programs
10 mL 10 mL 10 mL
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