Hach DR2400 - Page 625

DR/2400
Phosphorus, Reactive (Orthophosphate)
PhosphorusReac_AccuVac_Other_MOL_Eng_Ody.fm Page 1 of 6
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• For best results, sample temperature should be 20–25 °C (68–77 °F).
• After adding reagent, a yellow color will form if phosphate is present. The blank will be slightly yellow because of the reagent.
Phosphorus, Reactive
(Orthophosphate)
Method 8114
Molybdovanadate Method*
*Adapted from Standard Methods for the Examination of Water and Wastewater.
Reagent Solution or AccuVac
®
Ampuls
(0.3 to 45.0 mg/L PO
4
3-
)
Scope and Application: For water and wastewater
1. Touch
Hach Programs.
Select program
480 P React. Mo.
Touch
Start.
2. Using a graduated
cylinder, fill a round
sample cell (the blank)
with 25 mL of deionized
water.
3. Using a graduated
cylinder, fill a round
sample cell (the prepared
sample) with 25 mL
of sample.
4. Add 1.0 mL of
Molybdovanadate
Reagent to each sample
cell. Swirl to mix.
Tips and Techniques
10 mL
20 mL
25 mL
Reagent Solution Method 8114
Hach Programs
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL